CVE-2026-31826Medium· 6.5▾ SunlitA flaw was found in pypdf, a pure-Python PDF library. An attacker can craft a malicious PDF file containing a content stream with an intentionally large /Length value. When this PDF is parsed, it can lead to excessive memory consumption, r…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 35.8 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Aug 4.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
0.2% → 0.2%
Last analysed / modified upstream
— → 6.5
A flaw was found in pypdf, a pure-Python PDF library. An attacker can craft a malicious PDF file containing a content stream with an intentionally large /Length value. When this PDF is parsed, it can lead to excessive memory consumption, resulting in a Denial of Service (DoS) condition due to resource exhaustion.
pypdf: pypdf: Denial of Service due to excessive memory consumption via crafted PDF — rated Moderate by Red Hat. Released 2026-03-10, updated 2026-10-15.
Affected:
No fix planned:
Fix deferred
Workarounds / mitigations:
Affected packages:
pypdf < 6.8.0Patched in:
pypdf 6.8.0Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-33123Medium· 4.3pypdf: pypdf: Denial of Service due to excessive resource consumption from crafted PDF (CVE-2026-33123)
CVE-2026-28351Medium· 6.5pypdf: pypdf: Denial of Service via crafted PDF with RunLengthDecode filter (CVE-2026-28351)
CVE-2026-28804Medium· 6.5pypdf: pypdf: Denial of Service via crafted PDF with ASCIIHexDecode filter (CVE-2026-28804)
CVE-2026-27888Medium· 5.3pypdf: pypdf: Denial of Service via crafted PDF (CVE-2026-27888)
CVE-2026-27025Medium· 6.5pypdf: pypdf: Denial of Service via crafted PDF with large font values (CVE-2026-27025)
CVE-2026-27026Medium· 6.5pypdf: pypdf: Denial of Service via malformed PDF /FlateDecode stream (CVE-2026-27026)