CVE-2026-91865

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-21. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

A small WS-Policy document using repeated policy references can force Neethi to re-expand the same references exponentially during normalization, consuming huge amounts of CPU and memory (denial of service). Users are recommended to upgrade to version 3.2.4, which fixes this issue.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

September 21, 2026

Last Modified

September 21, 2026

Advisory Details (2)

Auto-updated Sep 21, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-91865: Apache Neethi: Crafted policy references cause exponential expansion during normalization leading to denial of service

http://www.openwall.com/lists/oss-security/2026/09/18/12
generic
https://lists.apache.org/thread/l48btqh02rlpsgf5p6r5ltqk1cb69dtc

Vendor Advisories for CVE-2026-91865(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 22× in last 7d / 22× 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. 2026-09-25 06:16 UTCGHSA enrichment
  2. 2026-09-24 18:16 UTCEG score recompute
  3. 2026-09-24 18:16 UTCGHSA enrichment
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 06:16 UTCGHSA enrichment
  6. 2026-09-23 18:16 UTCEG score recompute
  7. 2026-09-23 18:16 UTCGHSA enrichment
  8. 2026-09-23 17:54 UTCEPSS rescore
  9. 2026-09-23 06:16 UTCGHSA enrichment
  10. 2026-09-22 18:16 UTCEG score recompute
  11. 2026-09-22 18:16 UTCGHSA enrichment
  12. 2026-09-22 16:01 UTCEPSS rescore
  13. 2026-09-22 06:16 UTCGHSA enrichment
  14. 2026-09-21 18:16 UTCEG score recompute
  15. 2026-09-21 18:16 UTCGHSA enrichment
  16. 2026-09-21 14:21 UTCEG score recompute▲ 7.50
  17. 2026-09-21 14:21 UTCGHSA enrichment
  18. 2026-09-21 14:20 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  19. 2026-09-21 13:19 UTCGHSA enrichment
  20. 2026-09-21 12:29 UTCNVD update
  21. 2026-09-21 11:35 UTCEG score recompute
  22. 2026-09-21 11:35 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91865?
CVE-2026-91865 is a high vulnerability published on September 21, 2026. A small WS-Policy document using repeated policy references can force Neethi to re-expand the same references exponentially during normalization, consuming huge amounts of CPU and memory (denial of service). Users are recommended to upgrade to version 3.2.4, which fixes this issue.
When was CVE-2026-91865 disclosed?
CVE-2026-91865 was first published in the National Vulnerability Database on September 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91865 actively exploited?
CVE-2026-91865 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 60.7% of all scored CVEs.
What is the CVSS score of CVE-2026-91865?
CVE-2026-91865 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-91865?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91865, 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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