CVE-2026-102998
highpypdf is a free and open-source pure-python PDF library.
Vendor / product: Pypdf Project — pypdf
pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF with form field values can cause pypdf/generic/_appearance_stream.py appearance-stream generation to repeat invariant selection-data work inside a loop when an application updates fields with flattening enabled, resulting in excessive runtimes and application unavailability. This issue is fixed in version 6.19.0.
CVSS
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-09-30 21:17
Modified: 2026-10-05 15:05
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 06:56 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
pypdf_project / pypdf <6.19.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/py-pdf/pypdf/commit/959467a9b95be83e2dc5ae873ece5f371263ede7
Patch / mitigation: https://github.com/py-pdf/pypdf/pull/4087
References
- https://github.com/py-pdf/pypdf/commit/959467a9b95be83e2dc5ae873ece5f371263ede7 security-advisories@github.com
- https://github.com/py-pdf/pypdf/pull/4087 security-advisories@github.com
- https://github.com/py-pdf/pypdf/releases/tag/6.19.0 security-advisories@github.com
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-php9-fj8v-98fj security-advisories@github.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:56 UTC · record ↗