CVE-2026-103000 (GCVE-0-2026-103000)
Vulnerability from cvelistv5 – Published: 2026-09-30 20:13 – Updated: 2026-09-30 20:49
VLAI
EPSS
VEX
Title
pypdf: Possible large memory usage when retrieving alphabetical page labels
Summary
pypdf is a free and open-source pure-python PDF library. Prior to 6.19.0, a crafted PDF can provide unusually large alphabetical page-label values that cause pypdf/_page_labels.py to generate strings beyond a reasonable page-label length when an application retrieves document page labels, consuming excessive memory and potentially making the application unavailable. This issue is fixed in version 6.19.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 20:49 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/py-pdf/pypdf/security/advisori… | x_refsource_CONFIRM |
| https://github.com/py-pdf/pypdf/pull/4096 | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/commit/0d8b5a8832… | x_refsource_MISC |
| https://github.com/py-pdf/pypdf/releases/tag/6.19.0 | x_refsource_MISC |
Impacted products
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"id": "CVE-2026-103000",
"lastModified": "2026-10-05T15:03:11.473",
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"Recovery": "NOT_DEFINED",
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"modifiedPrivilegesRequired": "NOT_DEFINED",
"modifiedSubAvailabilityImpact": "NOT_DEFINED",
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"modifiedUserInteraction": "NOT_DEFINED",
"modifiedVulnAvailabilityImpact": "NOT_DEFINED",
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"modifiedVulnIntegrityImpact": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
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"valueDensity": "NOT_DEFINED",
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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