CVE-2026-27628
highpypdf is a free and open-source pure-python PDF library.
Vendor / product: Py-pdf — pypdf
pypdf is a free and open-source pure-python PDF library. Prior to 6.7.2, an attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires reading the file. This has been fixed in pypdf 6.7.2. As a workaround, one may apply the patch manually.
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: 2026-02-25 03:16
Modified: 2026-11-02 16:06
NVD status: Modified
Last synced 1 day ago
Verified against the source API 2026-11-03 07:34 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
py-pdf / pypdf <6.7.2
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/issues/3654
Patch / mitigation: https://github.com/py-pdf/pypdf/security/advisories/GHSA-2rw7-x74f-jg35
Patch / mitigation: https://github.com/py-pdf/pypdf/issues/3654
References
- https://github.com/py-pdf/pypdf/commit/f0a462d36971cf077d74492a348d0d06fd60ea4d security-advisories@github.com
- https://github.com/py-pdf/pypdf/issues/3654 security-advisories@github.com
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-2rw7-x74f-jg35 security-advisories@github.com
- https://github.com/py-pdf/pypdf/issues/3654 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
NVD CVE API 2.0 — fetched 2026-11-03 07:34 UTC · record ↗