mediumVulnerability
CVE-2026-84311
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/_page.py PageObject._extract_text and PageObject.extract_xform_text to traverse a directed acyclic graph of reused form XObjects in which each form invokes a child multiple times, creating exponentially many traversal paths and causing long runtimes and large memory consumption. This issue is fixed in version 6.16.1.
Properties
- severity
- medium
- summary
- pypdf: Possible long runtimes/large memory usage when extracting XForm objects
- epss_score
- 0.00135
- retrieved_at
- 2026-10-17T06:48:26+00:00
- ghsa_published
- 2026-09-01T21:27:22Z
- source_url
- https://github.com/advisories/GHSA-763m-79hh-57f2
- ghsa_updated
- 2026-09-01T21:27:24Z
- ghsa_id
- GHSA-763m-79hh-57f2
- last_source
- FIRST EPSS
- cve_id
- CVE-2026-84311
- signal_observed_at
- 2026-09-11T17:55:57+00:00
- is_ghsa_only
- false
- published_at
- 2026-09-01T21:18:46.887
- last_modified
- 2026-09-09T16:49:20.627
- epss_percentile
- 0.02618
Related Entities (6)
DESCRIBED_BY (1)
→[Source]NVD
ENRICHED_BY (1)
→[Source]FIRST EPSS
VULNERABLE_TO (1)
←[Software]pip/pypdf
AFFECTS (1)
→[Software]pip/pypdf
HAS_WEAKNESS (1)
→[Weakness]Excessive Iteration
REPORTED_BY (1)
→[Source]GitHub Advisory Database
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