PYSEC-2026-3005
pypdf has a possible infinite loop when loading circular /Prev entries in cross-reference streams
At a glance
- Published
- Updated
- CVE
- CVE-2026-27628
- Aliases
- GHSA-2rw7-x74f-jg35
- CVSS_V4
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
Description
### Impact An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading the file. ### Patches This has been fixed in [pypdf==6.7.2](https://github.com/py-pdf/pypdf/releases/tag/6.7.2). ### Workarounds If users cannot upgrade yet, consider applying the changes from PR [#3655](https://github.com/py-pdf/pypdf/pull/3655).
Affected packages
| Package | Versions |
|---|---|
| PyPI · pypdf | introduced 0, fixed 6.7.2 |
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-2rw7-x74f-jg35 WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-27628 ADVISORY
- https://github.com/py-pdf/pypdf/issues/3654 WEB
- https://github.com/py-pdf/pypdf/commit/f0a462d36971cf077d74492a348d0d06fd60ea4d WEB
- https://github.com/py-pdf/pypdf PACKAGE
- https://pypi.org/project/pypdf PACKAGE
- https://github.com/advisories/GHSA-2rw7-x74f-jg35 ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |