CVE-2026-57204

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 89% 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
Trending — 3 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
6.5(medium)
EPSS
10.7%
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.
github Patch Available

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

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
pypdf1.0 ... 6.9.2 (108 versions)6.13.3—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 32× 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.

  1. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-11 21:04 UTCEG score recompute
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-11 08:27 UTCEPSS rescore
  5. 2026-07-10 21:12 UTCEG score recompute
  6. 2026-07-09 21:20 UTCEG score recompute
  7. 2026-07-09 19:10 UTCEPSS rescore
  8. 2026-07-09 19:10 UTCEPSS rescore
  9. 2026-07-08 21:28 UTCEG score recompute
  10. 2026-07-08 15:16 UTCEPSS rescore
  11. 2026-07-08 15:16 UTCEPSS rescore
  12. 2026-07-07 21:35 UTCEG score recompute
  13. 2026-07-07 13:46 UTCEPSS rescore
  14. 2026-07-07 13:46 UTCEPSS rescore
  15. 2026-07-06 21:44 UTCEG score recompute▼ 0.40
  16. 2026-07-06 16:27 UTCEPSS rescore
  17. 2026-07-06 16:27 UTCEPSS rescore
  18. 2026-07-06 16:26 UTCNVD updateCVSS v3 → 6.5
  19. 2026-07-06 02:23 UTCEPSS rescore
  20. 2026-07-06 02:23 UTCEPSS rescore
  21. 2026-07-05 21:52 UTCEG score recompute
  22. 2026-07-05 02:31 UTCEPSS rescore
  23. 2026-07-05 02:30 UTCEPSS rescore
  24. 2026-07-04 22:00 UTCEG score recompute
  25. 2026-07-04 06:31 UTCEPSS rescore
Show 7 more
  1. 2026-07-04 06:31 UTCEPSS rescore
  2. 2026-07-03 22:09 UTCEG score recompute
  3. 2026-07-02 22:17 UTCEG score recompute
  4. 2026-07-01 22:24 UTCEG score recompute
  5. 2026-07-01 15:07 UTCEPSS rescore
  6. 2026-06-30 22:33 UTCEG score recompute
  7. 2026-06-30 22:33 UTCNVD updatefirst tracked

Related CVEs(same CWE)

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 in the National Vulnerability Database 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 10.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57204, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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