CVE-2025-71406

HIGHPre-NVD 7.87.8—
EchelonGraph scoreHIGH confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-25. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

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

Nokogiri before 1.18.4 bundles a vulnerable version of libxslt (prior to 1.1.43) that contains two use-after-free vulnerabilities: CVE-2025-24855 (use-after-free of the XPath context node due to xsltEvalXPathStringNs leaking xpathCtxt->node) and CVE-2024-55549 (use-after-free related to excluded result prefixes/namespaces). Processing crafted XSLT can trigger memory corruption. Nokogiri 1.18.4 upgrades the bundled libxslt to 1.1.43 to resolve these issues.

CVSS v3
7.8
EG Score
7.8(high)
EG Risk
50(Track)
EG Risk 50/100SSVC: Track

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
Severity78% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 25, 2026
Patch available. Sources: github.
github Patch Available

Nokogiri updates packaged libxslt to v1.1.43 to resolve multiple CVEs · Advisory · sparklemotion/nokogiri · GitHub

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-mrxw-mxhj-p664

Vendor Advisories for CVE-2025-71406(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
RubyGems(1)
PackageVulnerable rangeFixed inDependents
nokogiri1.0.0 ... 1.9.1 (183 versions)1.18.4—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 23× 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. 2026-08-30 04:36 UTCEG score recompute
  2. 2026-08-30 04:36 UTCGHSA enrichment
  3. 2026-08-30 01:21 UTCEPSS rescore
  4. 2026-08-29 17:29 UTCGHSA enrichment
  5. 2026-08-29 06:14 UTCEG score recompute
  6. 2026-08-29 06:14 UTCGHSA enrichment
  7. 2026-08-28 21:40 UTCEPSS rescore
  8. 2026-08-28 19:07 UTCGHSA enrichment
  9. 2026-08-28 13:52 UTCGHSA enrichment
  10. 2026-08-28 02:45 UTCGHSA enrichment
  11. 2026-08-27 15:40 UTCGHSA enrichment
  12. 2026-08-27 04:30 UTCGHSA enrichment
  13. 2026-08-26 17:23 UTCEG score recompute
  14. 2026-08-26 17:23 UTCGHSA enrichment
  15. 2026-08-26 16:23 UTCEG score recompute
  16. 2026-08-26 16:23 UTCGHSA enrichment
  17. 2026-08-26 14:45 UTCEPSS rescore
  18. 2026-08-26 14:36 UTCGHSA enrichment
  19. 2026-08-26 03:29 UTCEG score recompute
  20. 2026-08-26 03:29 UTCGHSA enrichment
  21. 2026-08-25 16:24 UTCEG score recompute
  22. 2026-08-25 15:30 UTCEG score recompute
  23. 2026-08-25 15:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-71406?
CVE-2025-71406 is a high vulnerability published on August 25, 2026. Nokogiri before 1.18.4 bundles a vulnerable version of libxslt (prior to 1.1.43) that contains two use-after-free vulnerabilities: CVE-2025-24855 (use-after-free of the XPath context node due to xsltEvalXPathStringNs leaking xpathCtxt->node) and CVE-2024-55549 (use-after-free related to excluded…
When was CVE-2025-71406 disclosed?
CVE-2025-71406 was first published in the National Vulnerability Database on August 25, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-71406 actively exploited?
CVE-2025-71406 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 91.6% of all scored CVEs.
What is the CVSS score of CVE-2025-71406?
CVE-2025-71406 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2025-71406?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-71406, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-71406

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