CVE-2026-73581

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under CISA-ADP (Vulnrichment) CVSS v3.1 (NVD's own analysis pending). EPSS exploit probability: 0.1% (1st percentile of EPSS-scored CVEs). 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: cisa-adp, epss
Trending — 4 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0-M1 through 9.0.121.

The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.26, 10.1.59, 9.0.122, which fixes the issue.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100CISA SSVC

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%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 23, 2026

Last Modified

September 30, 2026

Advisory Details (1)

Auto-updated Sep 23, 2026
Patch available.
generic
https://lists.apache.org/thread/r0dj3h1pbn4wv96fhsfrnz3t6874t6do

Vendor Advisories for CVE-2026-73581(3)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhattomcat10-main-10.1.60-0.1.hum12026-09-16redhat
redhattomcat11-main-11.0.26-0.1.hum12026-09-16redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 25× in last 7d / 44× 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. 2026-10-04 09:13 UTCEG score recompute
  2. 2026-10-04 09:13 UTCVendor advisory
  3. 2026-10-04 09:13 UTCGHSA enrichment
  4. 2026-10-03 14:26 UTCEPSS rescore
  5. 2026-10-03 10:50 UTCEG score recompute
  6. 2026-10-03 10:50 UTCVendor advisory
  7. 2026-10-03 10:50 UTCGHSA enrichment
  8. 2026-10-02 12:26 UTCEG score recompute
  9. 2026-10-02 12:26 UTCVendor advisory
  10. 2026-10-02 12:26 UTCGHSA enrichment
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-10-01 14:03 UTCVendor advisory
  13. 2026-10-01 14:03 UTCGHSA enrichment
  14. 2026-09-30 15:40 UTCEG score recompute
  15. 2026-09-30 15:40 UTCVendor advisory
  16. 2026-09-30 15:39 UTCGHSA enrichment
  17. 2026-09-30 14:53 UTCVendor advisory
  18. 2026-09-30 14:53 UTCGHSA enrichment
  19. 2026-09-30 08:16 UTCVendor advisory
  20. 2026-09-30 08:16 UTCGHSA enrichment
  21. 2026-09-29 09:53 UTCEG score recompute
  22. 2026-09-29 09:53 UTCGHSA enrichment
  23. 2026-09-28 13:52 UTCEPSS rescore
  24. 2026-09-28 11:30 UTCEG score recompute
  25. 2026-09-28 11:30 UTCGHSA enrichment
Show 19 more
  1. 2026-09-27 13:48 UTCEPSS rescore
  2. 2026-09-27 13:07 UTCEG score recompute
  3. 2026-09-27 13:07 UTCGHSA enrichment
  4. 2026-09-26 15:59 UTCEPSS rescore
  5. 2026-09-26 14:44 UTCEG score recompute
  6. 2026-09-26 14:44 UTCGHSA enrichment
  7. 2026-09-25 16:21 UTCGHSA enrichment
  8. 2026-09-24 17:58 UTCEG score recompute
  9. 2026-09-24 17:58 UTCGHSA enrichment
  10. 2026-09-23 19:30 UTCGHSA enrichment
  11. 2026-09-23 18:23 UTCGHSA enrichment
  12. 2026-09-23 17:59 UTCGHSA enrichment
  13. 2026-09-23 16:18 UTCGHSA enrichment
  14. 2026-09-23 15:29 UTCEG score recompute▲ 6.50
  15. 2026-09-23 15:29 UTCGHSA enrichment
  16. 2026-09-23 15:29 UTCMITRE cvelistV5CVSS v3 → 6.5 · severity → MEDIUM
  17. 2026-09-23 12:29 UTCNVD update
  18. 2026-09-23 11:21 UTCEG score recompute
  19. 2026-09-23 11:21 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-73581?
CVE-2026-73581 is a medium vulnerability published on September 23, 2026. Improper Check for Certificate Revocation vulnerability in Apache Tomcat. Both the OpenSSL and OpenSSL-FFM TLS implementations ignore CRLs when certificate uses a keystore. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0-M1 through…
When was CVE-2026-73581 disclosed?
CVE-2026-73581 was first published on September 23, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73581 actively exploited?
CVE-2026-73581 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73581?
CVE-2026-73581 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-73581?
A fix for CVE-2026-73581 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-73581 are linked in the Vendor Advisories panel on this page.

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