What is GHSA-j543-4vmf-qm7v?

GHSA-j543-4vmf-qm7v is a security advisory published by GitHub Security Advisories with Medium severity. pypdf: Possible large memory usage for form XObjects during text extraction

Which CVE IDs does GHSA-j543-4vmf-qm7v cover?

GHSA-j543-4vmf-qm7v covers the following CVE IDs: CVE-2026-49461. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-j543-4vmf-qm7v?

GHSA-j543-4vmf-qm7v affects 1 product, including: pip/pypdf:\u003c 6.12.2.

GHSA-j543-4vmf-qm7vMedium

pypdf: Possible large memory usage for form XObjects during text extraction

Vendor

GitHub Security Advisories

Published

June 16, 2026

Last Modified

June 16, 2026

🔗 CVE IDs covered (1)

CVE-2026-49461 →

📋 Description

Impact

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.

Patches

This has been fixed in pypdf==6.12.2.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #3805.

🎯 Affected products1

pip/pypdf:< 6.12.2

🔗 References (4)

https://github.com/py-pdf/pypdf/security/advisories/GHSA-j543-4vmf-qm7v
https://github.com/py-pdf/pypdf/pull/3805
https://github.com/py-pdf/pypdf/releases/tag/6.12.2
https://github.com/advisories/GHSA-j543-4vmf-qm7v