CVE-2026-28351Medium· 6.5▾ SunlitA flaw was found in pypdf, a free and open-source pure-python PDF library. An attacker can exploit this vulnerability by crafting a malicious PDF file that, when parsed, leads to excessive memory consumption. This occurs specifically when …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.8 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 1.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.4%
Last analysed / modified upstream
— → 6.5
0.4% → 0.5%
A flaw was found in pypdf, a free and open-source pure-python PDF library. An attacker can exploit this vulnerability by crafting a malicious PDF file that, when parsed, leads to excessive memory consumption. This occurs specifically when processing the content stream using the RunLengthDecode filter. Successful exploitation can result in a Denial of Service (DoS) condition due to large memory usage.
pypdf: pypdf: Denial of Service via crafted PDF with RunLengthDecode filter — rated Moderate by Red Hat. Released 2026-02-27, updated 2026-10-15.
Affected:
No fix planned:
Not affected:
Fix deferred
Affected packages:
pypdf < 6.7.4Patched in:
pypdf 6.7.4Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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