CVE-2026-69246

Description

Guzzle is an extensible PHP HTTP client. Prior to 7.15.2 and 8.0.1, Guzzle gives a transport the request URI as text and supplies the Host header separately. The cURL handlers set CURLOPT_URL to the URI exactly as written and push that Host into CURLOPT_HTTPHEADER; StreamHandler does the same through fopen(). libcurl then parses the authority itself, percent-decoding it and, on an IDN-capable build, applying IDNA mapping, and uses the result to resolve, connect, name the TLS peer and address a proxy CONNECT, while the supplied Host suppresses the aligned one libcurl would have generated. For a URI host written as 127.0.0.%31, filter_var() rejects the host as an IP literal, yet libcurl decodes it to 127.0.0.1 and reaches loopback with no DNS lookup while the server receives Host: 127.0.0.%31. An attacker who influences a fetched URI can therefore reach a host the application's checks excluded and read whatever the host exposes of the response. The same divergence moves Guzzle's own decisions onto a spelling the transport does not use: no_proxy selects proxy routing from the literal host, and RedirectMiddleware decides from it whether to strip Authorization and Cookie. Exploitation requires the application to build a request URI from untrusted input and to make a host decision before handing it to Guzzle. This issue is fixed in versions 7.15.2 and 8.0.1.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_M
CVSS severity: HIGH
CVSS score: 7.2 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Effective score: 7.2 / 10 HIGH source: CNA overview
CWE(s): CWE-180, CWE-436, CWE-918, CWE-941
Reserved: 2026-08-03
Published: 2026-08-03 21:07 UTC
Last updated: 2026-08-03 21:07 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/69xxx/CVE-2026-69246.json
Linked Threat: CVE-2026-69246 — Guzzle: Noncanonical host can bypass host-based checks

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-08-03 21:16:42 UTC
NVD last modified: 2026-08-04 15:16:42 UTC
NVD CVSS v3.1: 7.2 / 10 HIGH source: security-advisories@github.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Exploitability subscore: 3.9 / 10
Impact subscore: 2.7 / 10
EPSS score: 0.0021 (probability of exploitation in next 30 days)
EPSS percentile: 11.74% vs all CVEs — higher = more likely to be exploited, as of 2026-08-04

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-52445
Assigner: GitHub_M
Published: Aug 3, 2026, 9:07:04 PM
Updated: Aug 4, 2026, 2:06:40 PM
EUVD base score (CVSS 3.1): 7.2 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
EUVD-reported EPSS: 0.0000
Vendors: guzzle
Products: guzzle (< 7.15.2)

guzzle (8.0.0, < 8.0.1)
Aliases: GHSA-v5mv-p594-2x33

ENISA description: Guzzle is an extensible PHP HTTP client. Prior to 7.15.2 and 8.0.1, Guzzle gives a transport the request URI as text and supplies the Host header separately. The cURL handlers set CURLOPT_URL to the URI exactly as written and push that Host into CURLOPT_HTTPHEADER; StreamHandler does the same through fopen(). libcurl then parses the authority itself, percent-decoding it and, on an IDN-capable build, applying IDNA mapping, and uses the result to resolve, connect, name the TLS peer and address a proxy CONNECT, while the supplied Host suppresses the aligned one libcurl would have generated. For a URI host written as 127.0.0.%31, filter_var() rejects the host as an IP literal, yet libcurl decodes it to 127.0.0.1 and reaches loopback with no DNS lookup while the server receives Host: 127.0.0.%31. An attacker who influences a fetched URI can therefore reach a host the application's checks excluded and read whatever the host exposes of the response. The same divergence moves Guzzle's own decisions onto a spelling the transport does not use: no_proxy selects proxy routing from the literal host, and RedirectMiddleware decides from it whether to strip Authorization and Cookie. Exploitation requires the application to build a request URI from untrusted input and to make a host decision before handing it to Guzzle. This issue is fixed in versions 7.15.2 and 8.0.1.

EUVD references (7)

Affected products (1)

Vendor	Product	Versions	Platforms
guzzle	guzzle	`>= 8.0.0, < 8.0.1` (affected), `< 7.15.2` (affected)	—

Vendor references (7)

References embedded in the original CVE record by the assigning CNA.

https://github.com/guzzle/guzzle/security/advisories/GHSA-v5mv-p594-2x33 x_refsource_CONFIRM
https://github.com/guzzle/guzzle/pull/3907 x_refsource_MISC
https://github.com/guzzle/guzzle/pull/3908 x_refsource_MISC
https://github.com/guzzle/guzzle/commit/3aeea0406aab88cbbd86531313d7cebf8ae149a4 x_refsource_MISC
https://github.com/guzzle/guzzle/commit/744101956d78b7c1384d0cbf379db13e859167bf x_refsource_MISC
https://github.com/guzzle/guzzle/releases/tag/7.15.2 x_refsource_MISC
https://github.com/guzzle/guzzle/releases/tag/8.0.1 x_refsource_MISC

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (7)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://github.com/guzzle/guzzle/commit/3aeea0406aab88cbbd86531313d7cebf8ae149a4 security-advisories@github.com
https://github.com/guzzle/guzzle/commit/744101956d78b7c1384d0cbf379db13e859167bf security-advisories@github.com
https://github.com/guzzle/guzzle/pull/3907 security-advisories@github.com
https://github.com/guzzle/guzzle/pull/3908 security-advisories@github.com
https://github.com/guzzle/guzzle/releases/tag/7.15.2 security-advisories@github.com
https://github.com/guzzle/guzzle/releases/tag/8.0.1 security-advisories@github.com
https://github.com/guzzle/guzzle/security/advisories/GHSA-v5mv-p594-2x33 security-advisories@github.com

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Microsoft Patch Tuesday June 2026 - 198 Vulnerabilities Fixed ...

web:cybersecuritynews.com

Microsoft has released its June 2026 Patch Tuesday security updates, addressing a hefty 198 vulnerabilities across its product ecosystem. The June rollout, published on June 9, 2026 , stands out not only for its volume but also for the inclusion of three zero-day vulnerabilities that were actively exploited or publicly known before a fix was available. Administrators are urged to prioritize ...

2026-08-04 20:24 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-08-04 20:24 UTC
SAP Security Patch Day - June 2026

web:support.sap.com

SAP security Patch Day Bulletin This post shares the information on security notes that remediate vulnerabilities discovered in SAP products. SAP strongly recommends that the customer visits the support portal and applies patches on priority to protect their SAP landscape. On 9th of June 2026 , SAP security patch day saw the release of 15 new security notes.

2026-08-04 20:24 UTC
Addressing Exchange Server May 2026 vulnerability CVE-2026-42897 ...

web:techcommunity.microsoft.com

Hi team, Our organization has successfully implemented the recommended mitigation for CVE - 2026 -42897. However, we are currently experiencing the documented known issues within our environment. Could the Exchange team kindly provide a tentative timeline or ETA for a permanent security update that resolves the underlying vulnerability while addressing these known issues? We would greatly ...

2026-08-04 20:24 UTC
June 2026 Patch Tuesday: Updates and Analysis | CrowdStrike

web:www.crowdstrike.com

Microsoft patches 206 vulnerabilities in June 2026 Patch Tuesday, including three publicly disclosed zero-days.

2026-08-04 20:24 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-08-04 20:24 UTC
Oracle Critical Security Patch Update Advisory - June 2026

web:www.oracle.com

Additional CVEs addressed are: The patch for CVE - 2026 -34481 also addresses CVE - 2026 -34477, CVE - 2026 -34478, CVE - 2026 -34479, and CVE - 2026 -34480. Oracle Fusion Middleware Risk Matrix This Critical Security Patch Update contains 106 new security patches for Oracle Fusion Middleware. 53 of these vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a ...

2026-08-04 20:24 UTC
Patch Tuesday - June 2026 - Rapid7

web:www.rapid7.com

Microsoft is publishing 200 vulnerabilities on June 2026 Patch Tuesday, including an HTTP/2 denial of service vulnerability and an elevation of privilege vulnerability in PowerToys.

2026-08-04 20:24 UTC
I tested Windows 11 June 2026 Updates: Here's ... - Windows Latest

web:www.windowslatest.com

Windows 11 June 2026 Patch Tuesday update brings Low Latency Profile, Shared Audio, Multi-App Camera, NPU tracking, and Secure Boot updates.

2026-08-04 20:24 UTC
Patch Tuesday July 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's July 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-08-04 20:24 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-69246.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "guzzle",
          "vendor": "guzzle",
          "versions": [
            {
              "status": "affected",
              "version": ">= 8.0.0, < 8.0.1"
            },
            {
              "status": "affected",
              "version": "< 7.15.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Guzzle is an extensible PHP HTTP client. Prior to 7.15.2 and 8.0.1, Guzzle gives a transport the request URI as text and supplies the Host header separately. The cURL handlers set CURLOPT_URL to the URI exactly as written and push that Host into CURLOPT_HTTPHEADER; StreamHandler does the same through fopen(). libcurl then parses the authority itself, percent-decoding it and, on an IDN-capable build, applying IDNA mapping, and uses the result to resolve, connect, name the TLS peer and address a proxy CONNECT, while the supplied Host suppresses the aligned one libcurl would have generated. For a URI host written as 127.0.0.%31, filter_var() rejects the host as an IP literal, yet libcurl decodes it to 127.0.0.1 and reaches loopback with no DNS lookup while the server receives Host: 127.0.0.%31. An attacker who influences a fetched URI can therefore reach a host the application's checks excluded and read whatever the host exposes of the response. The same divergence moves Guzzle's own decisions onto a spelling the transport does not use: no_proxy selects proxy routing from the literal host, and RedirectMiddleware decides from it whether to strip Authorization and Cookie. Exploitation requires the application to build a request URI from untrusted input and to make a host decision before handing it to Guzzle. This issue is fixed in versions 7.15.2 and 8.0.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-180",
              "description": "CWE-180: Incorrect Behavior Order: Validate Before Canonicalize",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-436",
              "description": "CWE-436: Interpretation Conflict",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-941",
              "description": "CWE-941: Incorrectly Specified Destination in a Communication Channel",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-03T21:07:04.228Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/guzzle/guzzle/security/advisories/GHSA-v5mv-p594-2x33",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/guzzle/guzzle/security/advisories/GHSA-v5mv-p594-2x33"
        },
        {
          "name": "https://github.com/guzzle/guzzle/pull/3907",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/guzzle/guzzle/pull/3907"
        },
        {
          "name": "https://github.com/guzzle/guzzle/pull/3908",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/guzzle/guzzle/pull/3908"
        },
        {
          "name": "https://github.com/guzzle/guzzle/commit/3aeea0406aab88cbbd86531313d7cebf8ae149a4",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/guzzle/guzzle/commit/3aeea0406aab88cbbd86531313d7cebf8ae149a4"
        },
        {
          "name": "https://github.com/guzzle/guzzle/commit/744101956d78b7c1384d0cbf379db13e859167bf",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/guzzle/guzzle/commit/744101956d78b7c1384d0cbf379db13e859167bf"
        },
        {
          "name": "https://github.com/guzzle/guzzle/releases/tag/7.15.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/guzzle/guzzle/releases/tag/7.15.2"
        },
        {
          "name": "https://github.com/guzzle/guzzle/releases/tag/8.0.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/guzzle/guzzle/releases/tag/8.0.1"
        }
      ],
      "source": {
        "advisory": "GHSA-v5mv-p594-2x33",
        "discovery": "UNKNOWN"
      },
      "title": "Guzzle: Noncanonical host can bypass host-based checks"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-69246",
    "datePublished": "2026-08-03T21:07:04.228Z",
    "dateReserved": "2026-08-03T19:54:19.852Z",
    "dateUpdated": "2026-08-03T21:07:04.228Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}