SB2026060841 - Multiple vulnerabilities in PyPDF

Description

This security bulletin contains information about 2 vulnerabilities.

1) Infinite loop (CVE-ID: N/A)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an infinite loop in the outlines/bookmarks processing in writer when merging a PDF file with outlines into a writer. A remote attacker can supply a specially crafted PDF file to cause a denial of service.

2) Infinite loop (CVE-ID: N/A)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an infinite loop in font retrieval for layout-mode text extraction when processing a crafted PDF during text extraction in layout mode. A remote attacker can supply a specially crafted PDF to cause a denial of service.

Exploitation requires the application to extract text in layout mode.

Remediation

Install update from vendor's website.

References

• https://github.com/py-pdf/pypdf/security/advisories/GHSA-m2v9-299j-rv96
• https://github.com/py-pdf/pypdf/pull/3830
• https://github.com/py-pdf/pypdf/security/advisories/GHSA-52x6-gq3r-vpf4