CVE-2026-27025Medium· 6.5▾ SunlitA flaw was found in pypdf. An attacker can craft a malicious PDF file containing unusually large values in the /ToUnicode entry of a font. When this crafted PDF is processed, for example during text extraction, it can lead to excessive res…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 3.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
Last analysed / modified upstream
— → 6.5
0.2% → 0.2%
A flaw was found in pypdf. An attacker can craft a malicious PDF file containing unusually large values in the /ToUnicode entry of a font. When this crafted PDF is processed, for example during text extraction, it can lead to excessive resource consumption, resulting in a Denial of Service (DoS) due to long runtimes and large memory usage.
pypdf: pypdf: Denial of Service via crafted PDF with large font values — rated Moderate by Red Hat. Released 2026-02-20, updated 2026-10-15.
Affected:
No fix planned:
Fix deferred
Workarounds / mitigations:
Affected packages:
pypdf < 6.7.1Patched in:
pypdf 6.7.1Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-27026Medium· 6.5pypdf: pypdf: Denial of Service via malformed PDF /FlateDecode stream (CVE-2026-27026)
CVE-2026-27888Medium· 5.3pypdf: pypdf: Denial of Service via crafted PDF (CVE-2026-27888)
CVE-2026-27024Medium· 5.5pypdf: pypdf: Denial of Service via crafted PDF with TreeObject outlines (CVE-2026-27024)
CVE-2026-59937Medium· 6.5pypdf: pypdf: Denial of Service via crafted PDF with malformed cross-reference streams (CVE-2026-59937)
CVE-2026-33123Medium· 4.3pypdf: pypdf: Denial of Service due to excessive resource consumption from crafted PDF (CVE-2026-33123)
CVE-2026-31826Medium· 6.5pypdf: pypdf: Denial of Service due to excessive memory consumption via crafted PDF (CVE-2026-31826)