CVE-2026-123776

Description

RRD::CGI::Image versions through 0.01 for Perl pass CGI query parameters containting "tz" to tzset(), , so a FIFO or device path blocks the CGI process. The normalize_params method sends any query key matching /tz/i to tz(), which sets $ENV{TZ} to that value, with no validation. It then calls tzset(). glibc treats a TZ value starting with / or : as a file path and opens it, so a value naming a FIFO or a blocking device stalls the process inside tzset().

Overview

State: PUBLISHED
Assigner (CNA): CPANSec
CVSS severity: —
CVSS score: —
CVSS vector: —
Effective score: no score available from CNA, NVD, or AI yet
CWE(s): CWE-1287
Reserved: 2026-11-06
Published: 2026-11-07 11:51 UTC
Last updated: 2026-11-07 21:04 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/123xxx/CVE-2026-123776.json

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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-2026-119210

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Affected products (1)

Vendor	Product	Versions	Platforms
—	—	`0` (affected)	—

Vendor references (3)

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

https://rt.cpan.org/Ticket/Display.html?id=182627 vendor-advisoryissue-trackingpatch
https://man7.org/linux/man-pages/man3/tzset.3.html technical-description
https://security.metacpan.org/patches/R/RRD-CGI-Image/0.01/CVE-2026-123776-r1.patch patch

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.

Remediations (10)

RHSB-2026-012 Certificate compromise - eMudhra (CVE-2026-114406, CVE ...

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CISA Requires Federal Agencies to Patch Critical Vulnerabilities Within ...

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The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued Binding Operational Directive (BOD) 26-04, titled "Prioritizing Security Updates Based on Risk," compelling all Federal Civilian Executive Branch (FCEB) agencies to remediate the most dangerous known exploited vulnerabilities within just three calendar days.

2026-11-08 11:21 UTC
CVE Vulnerabilities 2026: Critical Flaws & Fixes Hub

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Track critical CVE vulnerabilities 2026 with verified enterprise patch guides. Fix zero-days across VMware, WordPress, Windows, and cloud infrastructure.

2026-11-08 11:21 UTC
sshole (CVE-2026-123158): OpenSSH Auth Bypass on Alpine | Cycode

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Learn about sshole ( CVE - 2026 -123158), an OpenSSH authentication bypass vulnerability affecting Alpine Linux, key exposure criteria, affected public images, and fix guidance.

2026-11-08 11:21 UTC
Remediate vulnerabilities | Security Advisory | NetScaler

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NetScaler detects CVEs and provides remediation suggestions the same. This topic lists the remediations suggested for the following CVEs :

2026-11-08 11:21 UTC
SAP Security Patch Day - October 2026

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On 13 th of October 2026 , SAP security patch day saw the release of 16 new security notes and 4 GitHub security advisories. There are 2 updates to previously released security notes.

2026-11-08 11:21 UTC
[Security Advisory] September 2026 CVE Advisory Notification

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What you need to know: On September 24, 2026 , ServiceNow issued CVE - 2026 -86857, CVE - 2026 -86858, CVE - 2026 -13016, CVE - 2026 -86859, and CVE - 2026 -86860. Each of these security issues was identified through internal security testing, customer security assessments, or reports submitted through ServiceNow's responsible disclosure and bug bounty programs and was remediated independently. For security ...

2026-11-08 11:21 UTC
Microsoft Paint CVE-2026-83844: Patching and Hunting

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CVE - 2026 -83844 is a remote code execution flaw in Windows 11 Paint. Microsoft now names 11.2609.401. as the fix . How to check the version, update and hunt.

2026-11-08 11:21 UTC
What Is CVE Remediation in 2026? - aikido.dev

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CVE remediation is fixing known flaws in the software you run. Why upgrading often fails, what remediation actually involves, and how backporting fixes it.

2026-11-08 11:21 UTC
The 8 Best Automated Vulnerability Remediation Tools in 2026

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Compare 8 automated vulnerability remediation tools for 2026 on fixes, prioritization, integrations, and deployment control.

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-123776.json.

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2026-11-07T21:04:27.035Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/11/07/11"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "modules": [
            "RRD::CGI::Image"
          ],
          "packageName": "RRD-CGI-Image",
          "packageURL": "pkg:cpan/RRD-CGI-Image",
          "programFiles": [
            "lib/RRD/CGI/Image.pm"
          ],
          "programRoutines": [
            {
              "name": "RRD::CGI::Image::normalize_params"
            }
          ],
          "versions": [
            {
              "lessThanOrEqual": "0.01",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "RRD::CGI::Image versions through 0.01 for Perl pass CGI query parameters containting \"tz\" to tzset(), , so a FIFO or device path blocks the CGI process.\n\nThe normalize_params method sends any query key matching /tz/i to tz(), which sets $ENV{TZ} to that value, with no validation. It then calls tzset(). glibc treats a TZ value starting with / or : as a file path and opens it, so a value naming a FIFO or a blocking device stalls the process inside tzset()."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1287",
              "description": "CWE-1287 Improper Validation of Specified Type of Input",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-07T11:51:18.541Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory",
            "issue-tracking",
            "patch"
          ],
          "url": "https://rt.cpan.org/Ticket/Display.html?id=182627"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://man7.org/linux/man-pages/man3/tzset.3.html"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://security.metacpan.org/patches/R/RRD-CGI-Image/0.01/CVE-2026-123776-r1.patch"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "Apply the patch."
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "RRD::CGI::Image versions through 0.01 for Perl pass CGI query parameters containting \"tz\" to tzset(), , so a FIFO or device path blocks the CGI process",
      "x_generator": {
        "engine": "cpansec-cna-tool 0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2026-123776",
    "datePublished": "2026-11-07T11:51:18.541Z",
    "dateReserved": "2026-11-06T14:15:29.328Z",
    "dateUpdated": "2026-11-07T21:04:27.035Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}