CVE-2025-62707

pypdf affected by possible infinite loop when reading DCT inline images without EOF marker

Description

pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires parsing the content stream of a page which has an inline image using the DCTDecode filter. This has been fixed in pypdf version 6.1.3.

Scores

Weaknesses (CWE)

• CWE-834

Advisories

• GHSA-vr63-x8vc-m265 — pypdf possibly loops infinitely when reading DCT inline images without EOF marker
• PYSEC-2026-1833 — pypdf possibly loops infinitely when reading DCT inline images without EOF marker

European references

• ENISA EUVD · EUVD-2025-35625
• GCVE · GCVE-0-2025-62707

Affected configurations (NVD CPE)

• cpe:2.3:a:pypdf_project:pypdf:*:*:*:*:*:*:*:* < 6.1.3

Affected products

References

• https://github.com/py-pdf/pypdf/security/advisories/GHSA-vr63-x8vc-m265
• https://github.com/py-pdf/pypdf/pull/3501
• https://github.com/py-pdf/pypdf/commit/f2864d6dd9bac7cecd3f4f54308b25ebbfa178f8
• https://github.com/py-pdf/pypdf/releases/tag/6.1.3

Sources