CVE-2026-102999pypdf: Possible long runtimes with large amount of embedded files
Updated under an hour ago ()
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It affects py-pdf pypdf and 1 other product. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.34%, higher than 26% of scored CVEs.
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Free account, 1 product
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.
- CVSS
- 8.7 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-400, CWE-407
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.34% (percentile 26)
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
py-pdf pypdf py_pdf:pypdf (from the name) | before 6.19.0 | CNA record |
pypdf_project pypdf pypdf_project:pypdf | before 6.19.0 | NVD |
References
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-v247-6f48-mgcjx-refsource-confirm, vendor-advisory
- https://github.com/py-pdf/pypdf/pull/4081x-refsource-misc, patch, issue-tracking
- https://github.com/py-pdf/pypdf/commit/6b10556d13609a68f9ed18bb29fdd8bba88eb2c3x-refsource-misc, patch
- https://github.com/py-pdf/pypdf/releases/tag/6.19.0x-refsource-misc, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.