CVE-2026-59937

highCVSS 7.5covered by 1 sourcefirst seen 2026-07-08

pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with repeated malformed cross-reference streams that cause pypdf to spend long runtimes recovering broken cross-reference table entries. This issue is fixed in version 6.14.0.

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Exploitation outlook

Low exploitation risk0.34% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 27% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-59937: pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craf…nvd · 2026-07-08

External references

NVD record for CVE-2026-59937

CVE.org record

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