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PYSEC-2026-1353

Vulnerability from pysec - Published: 2026-07-07 14:34 - Updated: 2026-07-07 14:34
VLAI
Details

Impact

A heap buffer overflow was found in Exiv2 versions v0.28.0 to v0.28.4. Versions prior to v0.28.0, such as v0.27.7, are not affected. Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. The heap overflow is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to gain code execution, if they can trick the victim into running Exiv2 on a crafted image file.

Note that this bug is only triggered when writing the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as fixiso.

Patches

The bug is fixed in version v0.28.5.

References

Issue: https://github.com/Exiv2/exiv2/issues/3168 Fix: https://github.com/Exiv2/exiv2/pull/3174

For more information

Please see our security policy for information about Exiv2 security.

Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Impacted products
Name purl
exiv2 pkg:pypi/exiv2
Aliases
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "exiv2",
        "purl": "pkg:pypi/exiv2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.28.0"
            },
            {
              "fixed": "0.28.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-26623",
    "GHSA-38h4-fx85-qcx7"
  ],
  "details": "### Impact\nA heap buffer overflow was found in Exiv2 versions v0.28.0 to v0.28.4. Versions prior to v0.28.0, such as v0.27.7, are **not** affected. Exiv2 is a command-line utility and C++ library for reading, writing, deleting, and modifying the metadata of image files. The heap overflow is triggered when Exiv2 is used to write metadata into a crafted image file. An attacker could potentially exploit the vulnerability to gain code execution, if they can trick the victim into running Exiv2 on a crafted image file.\n\nNote that this bug is only triggered when writing the metadata, which is a less frequently used Exiv2 operation than reading the metadata. For example, to trigger the bug in the Exiv2 command-line application, you need to add an extra command-line argument such as `fixiso`.\n\n### Patches\nThe bug is fixed in version v0.28.5.\n\n### References\nIssue: https://github.com/Exiv2/exiv2/issues/3168\nFix: https://github.com/Exiv2/exiv2/pull/3174\n\n### For more information\nPlease see our [security policy](https://github.com/Exiv2/exiv2/security/policy) for information about Exiv2 security.",
  "id": "PYSEC-2026-1353",
  "modified": "2026-07-07T14:34:50.155710Z",
  "published": "2026-07-07T14:34:50.155710Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Exiv2/exiv2/security/advisories/GHSA-38h4-fx85-qcx7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-26623"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Exiv2/exiv2/issues/3168"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Exiv2/exiv2/pull/3174"
    },
    {
      "type": "WEB",
      "url": "https://github.com/jim-easterbrook/python-exiv2/commit/4cc875e392f9e0bc705fe03d929b9a382b78dae4"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Exiv2/exiv2"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/exiv2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/advisories/GHSA-38h4-fx85-qcx7"
    }
  ],
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Exiv2 allows Use After Free"
}



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