CVE-2026-84310: medium-severity vulnerability in py-pdf pypdf
pypdf: Possible long runtimes/large memory usage when retrieving outlines
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.8epss 0.1%
pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_doc_common.py _get_outline to consume long runtimes and large amounts of memory when retrieving document outlines with large numbers of entries or deeply nested reused paths because the traversal lacked global entry-count and nesting-depth limits. This issue is fixed in version 6.16.1.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Affected products
py-pdf · pypdfRelated CVEs — py-pdf pypdf
In the same product, most dangerous first.
CVE-2023-36810MEDIUMQuadratic runtime with malformed PDF missing xref marker in pypdfEPSS 0.6%CVE-2026-59936HIGHpypdf: Possible infinite loop for not terminated inline imagesEPSS 0.6%CVE-2026-59935HIGHpypdf: Possible infinite loop for not terminated inline images (ASCII85 and ASCIIHex filter)EPSS 0.6%CVE-2026-59937MEDIUMpypdf: Possible long runtimes for repeated malformed cross-reference entriesEPSS 0.6%CVE-2023-36807MEDIUMInfinite Loop when reading malformed objects in pypdfEPSS 0.6%CVE-2026-82398MEDIUMpypdf: Inefficient handling of non-whitespace inputs in read_until_whitespaceEPSS 0.5%