CVE-2026-47265
📛 CVE Title
AIOHTTP vulnerable to cross-origin redirect with per-request cookies
Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0, cookies set with the `cookies` parameter on requests are sent after following a cross-origin redirect. If a developer uses the `cookies` parameter on a per-request basis then sensitive data might be leaked to an attacker if they manage to control a redirect. Version 3.14.0 patches the issue. If unable to upgrade, using a `Cookie` header in the `headers` parameter is not vulnerable.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- GitHub_M
- CVSS severity
- MEDIUM
- CVSS score
- 6.6 / 10
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U- Effective score
- 6.6 / 10 MEDIUM source: CNA overview
- CWE(s)
-
CWE-346 - Reserved
- 2026-05-18
- Published
- 2026-06-02 18:32 UTC
- Last updated
- 2026-06-03 12:48 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/47xxx/CVE-2026-47265.json
- Linked Threat
- CVE-2026-47265 — CVE-2026-47265
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
- 2026-06-02 20:16:37 UTC
- NVD last modified
- 2026-07-21 19:10:00 UTC
- NVD CVSS v3.1
- 7.5 / 10 HIGH source: nvd@nist.gov
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 3.6 / 10
- EPSS score
- 0.0015 (probability of exploitation in next 30 days)
- EPSS percentile
- 4.73% vs all CVEs — higher = more likely to be exploited, as of 2026-08-01
NVD / KEV / EPSS data refreshed 2026-08-01 16:38 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
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-2026-34007 - Assigner
- GitHub_M
- Published
- Jun 2, 2026, 6:32:50 PM
- Updated
- Jun 3, 2026, 12:48:54 PM
- EUVD base score (CVSS 4.0)
-
6.6 / 10
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U - EUVD-reported EPSS
- 0.1500
- Vendors
- aio-libs
- Products
-
aiohttp (< 3.14.0)
- Aliases
-
GHSA-hg6j-4rv6-33pg
ENISA description: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0, cookies set with the `cookies` parameter on requests are sent after following a cross-origin redirect. If a developer uses the `cookies` parameter on a per-request basis then sensitive data might be leaked to an attacker if they manage to control a redirect. Version 3.14.0 patches the issue. If unable to upgrade, using a `Cookie` header in the `headers` parameter is not vulnerable.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| aio-libs | aiohttp |
< 3.14.0 (affected)
|
— |
Affected products — CPE 2.3 (1) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*
Vendor references (2)
References embedded in the original CVE record by the assigning CNA.
Web references (5)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://github.com/aio-libs/aiohttp/commit/f54c40851b0d6c4bbdab97ba518a223adda32478 tenable:github.com
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hg6j-4rv6-33pg tenable:github.com
- https://nvd.nist.gov/vuln/detail/CVE-2026-47265 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-47265 tenable:www.cve.org
- https://www.first.org/epss/ tenable:www.first.org
NVD-tagged references (2)
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/aio-libs/aiohttp/commit/f54c40851b0d6c4bbdab97ba518a223adda32478 security-advisories@github.com Patch
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hg6j-4rv6-33pg security-advisories@github.com MitigationPatchVendor Advisory
Remediations (20)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:en-forum.guildwars2.com
05/12/2026—May 12 Release Notes Note to users of third-party programs: The game may not launch or work properly after we release a new build if you use a third-party program, due to possible incompatibilities. ArenaNet cannot offer support if a third-party modification breaks, interferes with, or ...
2026-06-08 15:49 UTC -
web:federalnewsnetwork.com
The problem is most severe in operational technology (OT) environments. In these systems, a security fix often carries more risk than the bug it's meant to address. When a patch threatens the stability of a mission-critical service, the result is a dangerous, if necessary, paralysis. We need to stop treating speed as the only metric of success. The asymmetry of time Federal networks are a ...
2026-06-08 15:49 UTC -
web:hi.service-now.com
ServiceNow 24/7 Support Available Patches Australia Patch 2 Hot Fix 1 Zurich Patch 9 Hot Fix 1 See more for product documentation
2026-06-08 15:49 UTC -
web:msrc.microsoft.com
Security Update Guide - Microsoft Security Response Center
2026-06-08 15:49 UTC -
web:support.google.com
People from all over the world use Google Play to access apps and games every day. Before submitting an app, ask yourself if your app is appropriate for Google Play and compliant with local laws.
2026-06-08 15:49 UTC -
web:support.hpe.com
Hewlett Packard Enterprise support portal for business, enterprise, and IT users. Search the knowledge base, download software, manage cases, and learn in forums.
2026-06-08 15:49 UTC -
web:wa.me
Hosted by WhatsApp 2026 © WhatsApp LLC Privacy & Terms
2026-06-08 15:49 UTC -
web:warcraftmounts.com
Patch 12.0.5 - mounts listed by source.
2026-06-08 15:49 UTC -
web:www.glennbeck.com
Glenn starts the show by addressing the backlash he has received over his recent discussions on Russian influence in America and Aleksandr Dugin's influence in the West. Glenn warns of attempts to fix diagnoses in society that often lead to worse outcomes. Glenn takes calls from his listeners, who discuss a variety of issues, including questioning how political candidates linked to al-Qaeda ...
2026-06-08 15:49 UTC -
web:www.virustotal.com
VirusTotal is a platform for scanning files and URLs for viruses, malware, and other threats using multiple antivirus engines.
2026-06-08 15:49 UTC -
web:blog.qualys.com
May 2026's Patch Tuesday arrives with Microsoft addressing a fresh set of vulnerabilities across its ecosystem, reinforcing the ongoing need for timely patching in an increasingly threat-heavy…
2026-06-19 02:33 UTC -
web:blogs.oracle.com
For more information about the Critical Security Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.
2026-06-19 02:33 UTC -
web:cybersecuritynews.com
Microsoft has officially acknowledged a critical zero-day vulnerability in Microsoft Defender, publicly dubbed "RoguePlanet," and confirmed it is actively developing a security patch to address the flaw.
2026-06-19 02:33 UTC -
web:cybersecuritynews.com
Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.
2026-06-19 02:33 UTC -
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.
2026-06-19 02:33 UTC -
web:support.microsoft.com
Improvements This update includes new features and quality improvements that were part of the following update: May 12, 2026—KB5089549 (OS Builds 26200.8457 and 26100.8457) May 26, 2026—KB5089573 (OS Builds 26200.8524 and 26100.8524) This update addresses security vulnerabilities documented in the following guide: June 2026 Security Updates. The following summary outlines key quality ...
2026-06-19 02:33 UTC -
web:www.crowdstrike.com
Microsoft has released security updates for 130 vulnerabilities, including 30 critical, in its May 2026 Patch Tuesday rollout.
2026-06-19 02:33 UTC -
web:www.malwarebytes.com
Microsoft says it's working on a fix for an unpatched Defender vulnerability that can give attackers the highest level of access on Windows.
2026-06-19 02:33 UTC -
web:www.oracle.com
This Critical Security Patch Update contains 35 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Security Patch Update and other Oracle Software Security Assurance activities is located at May 2026 Critical Security Patch Update: Executive Summary and Analysis.
2026-06-19 02:33 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's June 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-06-19 02:33 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-47265.json.
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