CVE-2026-102995
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 6.18.1, a crafted PDF can place unusually large source-code or destination-string tokens in a font /ToUnicode mapping, causing pypdf/_cmap.py parse_bfchar to decode and retain oversized values during operations such as text extraction and consume excessive memory. This is a second follow-up to earlier /ToUnicode resource-consumption fixes and is limited to the remaining token-length path. This issue is fixed in version 6.18.1.
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 15:23
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 <6.18.1
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/319d0b823ce2c311a2435e9fd93c13994d32bb51
Patch / mitigation: https://github.com/py-pdf/pypdf/pull/4071
References
- https://github.com/py-pdf/pypdf/commit/319d0b823ce2c311a2435e9fd93c13994d32bb51 security-advisories@github.com
- https://github.com/py-pdf/pypdf/pull/4071 security-advisories@github.com
- https://github.com/py-pdf/pypdf/releases/tag/6.18.1 security-advisories@github.com
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-fp3h-c4fm-7vvf security-advisories@github.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:56 UTC · record ↗