PYSEC-2026-3024
pypdf has possible long runtimes/large memory usage for large /ToUnicode streams
En bref
- Publiée
- Mise à jour
- CVE
- CVE-2026-27025
- Alias
- GHSA-wgvp-vg3v-2xq3
- CVSS_V4
- CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Description
### Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes and large memory consumption. This requires parsing the `/ToUnicode` entry of a font with unusually large values, for example during text extraction. ### Patches This has been fixed in [pypdf==6.7.1](https://github.com/py-pdf/pypdf/releases/tag/6.7.1). ### Workarounds If you cannot upgrade yet, consider applying the changes from PR [#3646](https://github.com/py-pdf/pypdf/pull/3646).
Paquets affectés
| Paquet | Versions |
|---|---|
| PyPI · pypdf | introduced 0, fixed 6.7.1 |
Références
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-wgvp-vg3v-2xq3 WEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-27025 ADVISORY
- https://github.com/py-pdf/pypdf/pull/3646 WEB
- https://github.com/py-pdf/pypdf/commit/77d7b8d7cfbe8dd179858dfa42666f73fc6e57a2 WEB
- https://github.com/py-pdf/pypdf PACKAGE
- https://github.com/py-pdf/pypdf/releases/tag/6.7.1 WEB
- https://pypi.org/project/pypdf PACKAGE
- https://github.com/advisories/GHSA-wgvp-vg3v-2xq3 ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |