VulnSocial

CVE-2026-65637Patch(apache / tomcat)

LOWCVSS 9.8 · CRITICAL

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch apache tomcat systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD 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.

apache CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-20

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • tomcat

Threat summary

  • Patch or workaround signal is available
  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 2 signals
  • Technical details provided in 3 signals
  • General: 1 classified signal
  • Peaked 2d ago at 1 mentions (2026-08-26); latest day: 1
  • 3 total mentions across 3 days

Affected systems

Vendors
apache
Products
tomcat

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-08-26: 1Mentions · 2026-08-27: 1Mentions · 2026-09-02: 1Patch / Workaround · 2026-08-27: 1Patch / Workaround · 2026-09-02: 1Technical Details · 2026-08-26: 1Technical Details · 2026-08-27: 1Technical Details · 2026-09-02: 108-2608-2709-02
Signal classification2 categories
Patch
266.7%
General
133.3%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-08-261
General1
2026-08-271
Patch1
2026-09-021
Patch1
Full discourse3 posts
  • DFIR Lab@DFIR_Lab
    Patch

    🚨 CRITICAL: CVE-2026-65637 in Apache Tomcat (CVSS 9.8) Improper input validation due to incomplete fix for CVE-2026-32990. Affects versions 9.0.115-9.0.120, 10.1.53-10.1.57, 11.0.20-11.0.24. Patch immediately to 9.0.121, 10.1.58, or 11.0.25. #CVE #PatchNow https://t.co/zOdem95q17

    Post summary

    The tweet announces a critical Apache Tomcat CVE-2026-65637 with high severity, lists affected versions, and urges users to patch immediately.

    0000042
    122 followersView on X
  • SecAlerts@SecAlertsCo
    Patch

    🐱 Apache Tomcat CVSS 9.8: CVE-2026-65637 bypasses strict SNI validation via HTTP/2 no-authority requests. It's an incomplete fix for CVE-2026-32990. Tomcat 9.x, 10.1.x & 11.0.x affected. Patch now. #cybersecurity #ciso #cto #vulnerabilities #mssp https://secalerts.co/vulnerability/CVE-2026-65637?utm_campaign=x https://t.co/b63NOOmquZ

    Post summary

    Apache Tomcat CVE-2026-65637, a high‑severity vulnerability (CVSS 9.8) that bypasses strict SNI validation via HTTP/2 no‑authority requests, has been disclosed with affected Tomcat versions identified, and an official patch is now available.

    00000140
    881 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    General

    CVE-2026-65637 Improper Input Validation in Apache Tomcat Due to Incomplete CVE-... https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-65637 Customizable Vulnerability Alerts: https://alerts.vulmon.com/?utm_source=twitter&utm_medium=social&utm_campaign=2102281&utm_content=4

    Post summary

    The tweet announces CVE-2026-65637 with a brief note on improper input validation in Tomcat and links to Vulmon for additional details, but it contains no PoC, exploit code, patch information, or evidence of active exploitation.

    00000124
    4.1K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appapachetomcat---

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