CVE-2026-59936High▾ Twilightpypdf: Possible infinite loop for not terminated inline images
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 23.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
0.3%
Last analysed / modified upstream
An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires parsing the content stream of a page with a not terminated inline image, as done when extracting the page text for example.
This has been fixed in pypdf==6.14.1.
If you cannot upgrade yet, consider applying the changes from PR #3891.
pypdf < 6.14.1Upgrade to a patched release:
pypdf 6.14.1Connected by shared product, vendor, weakness, or advisory.
CVE-2026-84309Mediumpypdf is a free and open-source pure-python PDF library
CVE-2026-71870Mediumpypdf is a free and open-source pure-python PDF library
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CVE-2026-54530Mediumpypdf: Possible infinite loop when retrieving fonts for layout-mode text extraction