CVE-2026-57204

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 69% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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 v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
34
EG Risk 34/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.4%
EPSS %ILE
28th
KEV
Not listed

Published

June 30, 2026

Last Modified

July 6, 2026

Advisory Details (2)

Auto-updated Jun 30, 2026
Patch available. Sources: github_release, github.
githubMentions a patch (unverified)

Missing stream length values ignore defined limits · Advisory · py-pdf/pypdf · GitHub

https://github.com/py-pdf/pypdf/security/advisories/GHSA-jm82-fx9c-mx94
github_release Patch Available

Version 6.13.3, 2026-06-17

Patch available: py-pdf/pypdf 6.13.3

https://github.com/py-pdf/pypdf/releases/tag/6.13.3

Affected Packages

(6 across 5 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
pypdf3.17.4-1 ... 6.9.2-2 (15 versions)
  • every version on: no fix on record
—
pypdf22.12.1-3, 2.12.1-3+deb12u1, 2.12.1-4
  • every version on: no fix on record
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
pypdf21.26.0-4 ... 2.9.0-1 (24 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
pypdf5.4.0-1, 6.19.0-1, 6.9.0-1, 6.9.2-1, 6.9.2-2
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
pypdf5.4.0-1, 6.9.0-1, 6.9.2-1, 6.9.2-2
  • every version up to 6.19.0-1: fixed in 6.19.0-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
pypdf1.0 ... 6.9.2 (108 versions)
  • every version up to 6.13.3: fixed in 6.13.3
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 29× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 135 total refreshes for this CVE.

  1. 2026-10-10 20:00 UTCEPSS rescore
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  1. 2026-09-14 00:46 UTCEG score recompute
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  22. 2026-08-24 11:31 UTCEG score recompute
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  64. 2026-07-28 18:42 UTCEG score recompute
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  67. 2026-07-27 14:14 UTCEPSS rescore
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  75. 2026-07-23 14:18 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-57204?
CVE-2026-57204 is a medium vulnerability published on June 30, 2026. 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 MAXDECLAREDSTREAM_LENGTH is sometimes ignored. This requires parsing a content stream…
When was CVE-2026-57204 disclosed?
CVE-2026-57204 was first published on June 30, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57204 actively exploited?
CVE-2026-57204 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (28th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-57204?
CVE-2026-57204 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-57204?
A fix for CVE-2026-57204 is available: update to the fixed version the vendor names in its advisory.

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