8.7

CVE-2026-102995: py-pdf pypdf Uncontrolled Resource Consumption

CVSS: 8.7v4.0HighAnalyzed
AliasesGHSA-fp3h-c4fm-7vvfPYSEC-2026-4154UBUNTU-CVE-2026-102995
Published 30-09-2026Last modified 01-10-2026
Open JSON

Vulnerability summary

CVE-2026-102995 is a high (CVSS 8.7) Uncontrolled Resource Consumption vulnerability in py-pdf pypdf. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 26.5% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.7/10
010
High · v4.0 (CVE.org)
EPSS score
0.34%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 30-09-2026
    PublishedVulnerability first disclosed.
  2. 01-10-2026
    Last modifiedVulnerability information updated.

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.18.1, a crafted PDF can place unusually large source-code or destination-string tokens in a font /ToUnicode mapping, causing pypdf/_cmap.py parse_bfchar to decode and retain oversized values during operations such as text extraction and consume excessive memory. This is a second follow-up to earlier /ToUnicode resource-consumption fixes and is limited to the remaining token-length path. This issue is fixed in version 6.18.1.

CVSS metrics

7 scores · 5 sources · 2 versions

EPSS trend

Probability

0.34%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

01-10-202620-10-2026
EPSS score
0.34%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
  • pypdfAll versions (No fix recorded) | < 6.19.0-1
  • pypdf2All versions (No fix recorded)
Ubuntu2 products
  • pypdfAll versions (No fix recorded)
  • pypdf2All versions (No fix recorded)
Chainguard1 product
  • open-webui< 0.11.4-r3
Py-pdf1 product
Pypdf_project1 product
PyPI1 product
  • pypdf< 6.18.1
Wolfi1 product
  • open-webui< 0.11.4-r3

7 vendors · 9 products

References

11 links
Show all 11 references