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  4. CVE 2026 102999 pypdf possible long runtimes with large amount of
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Back to active CVEs
High · CVSS 8.7CVE-2026-102999GHSA-V247-6F48-MGCJ

pypdf: Possible long runtimes with large amount of embedded files

Answer in brief

CVE-2026-102999 records a High severity (CVSS 8.7) vulnerability in pypdf: Possible long runtimes with large amount of embedded files. The current sources do not mark it as known exploited. The current feed maps py-pdf/pypdf (generic), pypdf (pip), pypdf (pypi). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 30, 2026Updated Oct 1, 2026Source checked Oct 2, 2026First seen by HOL Sep 30, 2026Material review Oct 1, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps py-pdf/pypdf (generic), pypdf (pip), pypdf (pypi). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
py-pdf/pypdfgeneric<6.19.06.19.0
pypdfpip<6.19.06.19.0
pypdfpypi>=0 <6.19.06.19.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for py-pdf/pypdf, pypdf, pypdf.
  2. 2Review the reported fix. Update py-pdf/pypdf to 6.19.0; pypdf to 6.19.0; pypdf to 6.19.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 30, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • NVD vulnerability recordnvd.nist.gov
  • GitHub security advisorygithub.com
Upstream source description

pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF containing many embedded files can cause the dictionary-based attachments API in pypdf/_doc_common.py to reparse the full attachment list for each content lookup, producing repeated work and long runtimes when an application accesses the embedded-file mapping. This issue is fixed in version 6.19.0.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Mooncake transfer engine through 0.3.13.post1 Denial of Service via P2P Handshake Daemon Response WriteAlso CWE-400
  • stream-json: JSONC parser and verifier re-scan the whole accumulated comment on every input chunkAlso CWE-407
  • 389-ds-base: 389-ds-base: unauthenticated worker-thread-pool exhaustion via completed-operation-then-incomplete-pdu connection requeueAlso CWE-400
  • Office-PowerPoint-MCP-Server through 2.0.7 Path Traversal via save_presentation and manage_imageSame generic ecosystem
  • Wormhole.app SSRFSame generic ecosystem
  • Physical UART Access Leading to an Unauthenticated Root Shell in TP-Link Kasa EC70 and EC71Same generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-400, CWE-407
Source
CVE List V5
Source checked
Oct 2, 2026
References
7 linked sources
Open source record