Is there a public exploit for CVE-2026-102999?

No public exploit for CVE-2026-102999 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-102999?

CVE-2026-102999 scores CVSS 8.7 (v4.0), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.35%.

What does CVE-2026-102999 affect?

CVE-2026-102999 affects py-pdf pypdf.

8.7 High

pypdf is a free and open-source pure-python PDF library.

CVE-2026-102999

Impact An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing the embedded files through the dictionary-based API. Patches This has been fixed in [pypdf==6.19.0](https://github.com/py-pdf/pypdf/releases/tag/6.19.0). Workarounds If you cannot upgrade yet, consider applying the changes from PR [#4081](https://github.com/py-pdf/pypdf/pull/4081).

Assessment

CVSS: 8.7 (v4.0)
Severity: High
EPSS: 0.35% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 30 September 2026
Last updated: 2 November 2026
Affected: py-pdf · pypdf · pypdf
Weakness: CWE-400, CWE-407
Assigner: security-advisories@github.com

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

At the source

References

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