Vulnerability · Published Oct 29, 2026 · Assigned by GitHub_M
CVE-2026-119208pypdf: Possible long runtimes/large memory usage for encrypted PDF files
High 7.1
In plain English
A high-severity uncontrolled resource consumption in pypdf from py-pdf. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive time and memory when an application accesses the page count of a crafted encrypted PDF whose page tree declares a forged /Count value. Even after successful decryption, page-count retrieval trusts the unvalidated declared count instead of walking the page tree, allowing the attacker-controlled value to drive excessive work and memory use. This issue is fixed in version 6.21.3.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | pypdf | no fix listed | DEBIAN-CVE-2026-119208 |
| Debian:13 | pypdf | no fix listed | DEBIAN-CVE-2026-119208 |
| Debian:14 | pypdf | 6.21.4-1 | DEBIAN-CVE-2026-119208 |
| Debian:12 | pypdf2 | no fix listed | DEBIAN-CVE-2026-119208 |
| PyPI | pypdf | 6.21.3 | GHSA-62m5-6wh8-28x7 |
| Ubuntu:24.04:LTS | pypdf | no fix listed | UBUNTU-CVE-2026-119208 |
| Ubuntu:26.04:LTS | pypdf | no fix listed | UBUNTU-CVE-2026-119208 |
| Ubuntu:26.10 | pypdf | no fix listed | UBUNTU-CVE-2026-119208 |
Affected products (as reported)
Weakness: CWE-400 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-62m5-6wh8-28x7 x_refsource_CONFIRM
- https://github.com/py-pdf/pypdf/pull/4270 x_refsource_MISC
- https://github.com/py-pdf/pypdf/commit/82b91951dc74496bb3efe6465434f041bb6a5e6b x_refsource_MISC
- https://github.com/py-pdf/pypdf/releases/tag/6.21.3 x_refsource_MISC