CVE-2026-91867

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreHIGH confidence

Score 4.3 from GitHub Security Advisory published 2026-09-21. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 5 sources updated this week
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

When Neethi fetches a remote policy reference, it only limits the time per read, not the whole transfer, so a server that trickles bytes slowly can keep the fetch alive indefinitely and tie up the calling thread (denial of service). Users are recommended to upgrade to version 3.2.4, which fixes this issue.

CVSS v3
4.3
EG Score
4.3(high)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity43% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
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-2026-91867: Apache Neethi: Remote policy fetch lacks a total timeout, allowing a slow server to hang the request indefinitely

http://www.openwall.com/lists/oss-security/2026/09/18/14
generic
https://lists.apache.org/thread/dsr2ktf199mqhw2jtlbklyz7tzd86ycd

Vendor Advisories for CVE-2026-91867(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 17× in last 7d / 17× 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. 2026-09-24 18:00 UTCEG score recompute
  2. 2026-09-24 18:00 UTCGHSA enrichment
  3. 2026-09-24 14:04 UTCEPSS rescore
  4. 2026-09-23 17:54 UTCEPSS rescore
  5. 2026-09-23 17:38 UTCGHSA enrichment
  6. 2026-09-22 17:56 UTCEG score recompute
  7. 2026-09-22 17:56 UTCGHSA enrichment
  8. 2026-09-22 16:01 UTCEPSS rescore
  9. 2026-09-21 18:16 UTCEG score recompute
  10. 2026-09-21 18:16 UTCGHSA enrichment
  11. 2026-09-21 14:21 UTCEG score recompute▲ 4.30
  12. 2026-09-21 14:21 UTCGHSA enrichment
  13. 2026-09-21 14:20 UTCNVD updateCVSS v3 → 4.3 · severity → MEDIUM
  14. 2026-09-21 13:19 UTCGHSA enrichment
  15. 2026-09-21 12:29 UTCNVD update
  16. 2026-09-21 11:35 UTCEG score recompute
  17. 2026-09-21 11:35 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-91867?
CVE-2026-91867 is a medium vulnerability published on September 21, 2026. When Neethi fetches a remote policy reference, it only limits the time per read, not the whole transfer, so a server that trickles bytes slowly can keep the fetch alive indefinitely and tie up the calling thread (denial of service). Users are recommended to upgrade to version 3.2.4, which fixes…
When was CVE-2026-91867 disclosed?
CVE-2026-91867 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-2026-91867 actively exploited?
CVE-2026-91867 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 76.9% of all scored CVEs.
What is the CVSS score of CVE-2026-91867?
CVE-2026-91867 has a CVSS v3.1 base score of 4.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-91867?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91867, 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

Explore the affected products and dependency analysis for CVE-2026-91867

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