6.9

CVE-2026-57204: py-pdf pypdf Uncontrolled Resource Consumption

CVSS: 6.9v4.0MediumAnalyzed
AliasesGHSA-jm82-fx9c-mx94UBUNTU-CVE-2026-57204DEBIAN-CVE-2026-57204
Published 30-06-2026Last modified 01-07-2026
Open JSON

Vulnerability summary

CVE-2026-57204 is a medium (CVSS 6.9) Uncontrolled Resource Consumption vulnerability in py-pdf pypdf. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 29.1% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.37%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 30-06-2026
    PublishedVulnerability first disclosed.
  2. 01-07-2026
    Last modifiedVulnerability information updated.

Description

pypdf is a free and open-source pure-python PDF library. Prior to 6.13.3, a maliciously crafted PDF can cause DoS. An attacker who uses this vulnerability can craft a PDF which leads to large memory usage, as MAX_DECLARED_STREAM_LENGTH is sometimes ignored. This requires parsing a content stream without a /Length value. This issue has been fixed in version 6.13.3.

CVSS metrics

7 scores · 5 sources · 2 versions

EPSS trend

Probability

0.37%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

0.00 pp

From 0.37% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.37%

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)
Py-pdf1 product
Pypdf_project1 product
PyPI1 product
  • pypdf< 6.13.3
Ubuntu1 product
  • pypdfAll versions (No fix recorded)

5 vendors · 6 products

References

7 links