Vulnerability · Published Sep 30, 2026 · Assigned by GitHub_M
CVE-2026-102999pypdf: Possible long runtimes with large amount of embedded files
High 8.7
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 0.3% (higher than 28% 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 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachments API in pypdf/_doc_common.py to reparse the full attachment list for each content lookup, producing repeated work and long runtimes when an application accesses the embedded-file mapping. This issue is fixed in version 6.19.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | pypdf | no fix listed | DEBIAN-CVE-2026-102999 |
| Debian:14 | pypdf | 6.19.0-1 | DEBIAN-CVE-2026-102999 |
| PyPI | pypdf | 6.19.0 | PYSEC-2026-4159 |
| PyPI | pypdf | 6.19.0 | GHSA-v247-6f48-mgcj |
| Ubuntu:24.04:LTS | pypdf | no fix listed | UBUNTU-CVE-2026-102999 |
| Ubuntu:26.04:LTS | pypdf | no fix listed | UBUNTU-CVE-2026-102999 |
| Ubuntu:26.10 | pypdf | no fix listed | UBUNTU-CVE-2026-102999 |
| Ubuntu:22.04:LTS | pypdf2 | no fix listed | UBUNTU-CVE-2026-102999 |
| Ubuntu:24.04:LTS | pypdf2 | no fix listed | UBUNTU-CVE-2026-102999 |
Affected products (as reported)
Weakness: CWE-400, CWE-407 · Vector: 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
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-v247-6f48-mgcj x_refsource_CONFIRM
- https://github.com/py-pdf/pypdf/pull/4081 x_refsource_MISC
- https://github.com/py-pdf/pypdf/commit/6b10556d13609a68f9ed18bb29fdd8bba88eb2c3 x_refsource_MISC
- https://github.com/py-pdf/pypdf/releases/tag/6.19.0 x_refsource_MISC