CVE-2026-49461: pypdf: Possible large memory usage for form XObjects during text extraction

June 16, 2026

An attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires extracting the text of a page which contains a form XObject with self-references.

References

github.com/advisories/GHSA-j543-4vmf-qm7v
github.com/py-pdf/pypdf/pull/3805
github.com/py-pdf/pypdf/releases/tag/6.12.2
github.com/py-pdf/pypdf/security/advisories/GHSA-j543-4vmf-qm7v
nvd.nist.gov/vuln/detail/CVE-2026-49461

Code Behaviors & Features

Detect and mitigate CVE-2026-49461 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →