CVE-2026-65637

Apache Tomcat: HTTP/2 no-authority bypass of strict SNI validation - CVE-2026-32990 fix incomplete

At a glance

Severity: CRITICAL 9.8
EPSS: EPSS 0.61 % · percentile 49 (2026-10-27)
State: PUBLISHED
Published: 2026-08-25
Updated: 2026-08-26
Assigner: apache
NVD status: Analyzed

Description

Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990. This issue affects Apache Tomcat: from 11.0.20 through 11.0.24, from 10.1.53 through 10.1.57, from 9.0.115 through 9.0.120. Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Weaknesses (CWE)

CWE-20

Advisories

GHSA-f525-44xv-f2qj — Apache Tomcat - HTTP/2 no-authority bypass of strict SNI validation

European references

ENISA EUVD · EUVD-2026-66127
GCVE · GCVE-0-2026-65637

CERT-FR advisories

CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2026-AVI-1336 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2026-AVI-1249 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
CERTFR-2026-AVI-1165 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2026-AVI-1083 — Multiples vulnérabilités dans Apache Tomcat · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 9.0.115 < 9.0.121
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 10.1.53 < 10.1.58
cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:* ≥ 11.0.20 < 11.0.25

Affected products

Product	Versions
Apache Software Foundation · Apache Tomcat	affected 11.0.20 ≤ 11.0.24 ; affected 10.1.53 ≤ 10.1.57 ; affected 9.0.115 ≤ 9.0.120

References

https://lists.apache.org/thread/djog953z1ohsyt25bdvhfzbmsy22vgcj

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD