VulnerabilityAnalyzed

CVE-2026-102993

pypdf is a free and open-source pure-python PDF library.

HIGH 8.7EPSS 0.35%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.35%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.17.0, a crafted PDF can provide unusually large Roman page-label values that cause pypdf/_page_labels.py to generate excessively large numeral strings when an application retrieves document page labels, consuming large amounts of memory and potentially making the application unavailable. This issue is fixed in version 6.17.0.

CVSS 4.0: 8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.35% probability · 28th percentile
Public exploits: None in Exploit-DB
CISA KEV: Not listed
Weakness: CWE-400, CWE-770
Affected: pypdf project/pypdf
Source: security-advisories@github.com

EPSS trend

EPSS moved from 0.5% on 1 October 2026 to 0.3% on 26 October 2026.

References

https://github.com/py-pdf/pypdf/commit/89db7c4fe9315ecc964bfdf05a4e8c4b94175163Patch
https://github.com/py-pdf/pypdf/pull/4047Patch
https://github.com/py-pdf/pypdf/releases/tag/6.17.0Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-qv6h-rv94-w285Patch, Vendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.