PT-2026-49743 · Pypi+1 · Pypdf+1

Sagdeap · CVE-2026-54531 · Published 2026-06-16 · Updated 2026-07-29

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions pypdf versions prior to 6.13.0

Description A flaw in the pure-python PDF library allows an attacker to craft a PDF that triggers an infinite loop. This occurs when merging a file containing outlines into a writer.

Recommendations Update to version 6.13.0. As a temporary workaround, apply the changes from PR #3830.

Exploit

Fix

DoS

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

CLEANSTART-2026-EH47852

CLEANSTART-2026-GN02455

CVE-2026-54531

GHSA-M2V9-299J-RV96

PYSEC-2026-3022

Affected Products

Red Os

Pypdf

References · 78

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54531.json · Exploit
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-m2v9-299j-rv96 · Vendor Advisory
• https://github.com/py-pdf/pypdf/releases/tag/6.13.0 · Patch
• https://github.com/py-pdf/pypdf/pull/3830 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-54531 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-48818 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-59938 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-48526 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-54283 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-48524 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-48522 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-53537 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-54651 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-54531 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-59937 · Security Note