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CVE-2026-41293

📛 CVE Title

Apache Tomcat: HTTP/2 request headers not validated

Description

Improper Input Validation vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 10.0.0-M1 through 10.0.27. Older, end of support versions may also be affected. Users are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.

Overview

State
PUBLISHED
Assigner (CNA)
apache
CVSS severity
critical
CVSS score
CVSS 9.8 / 10 9.8 9.8 / 10
CVSS vector
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Effective score
9.8 / 10 CRITICAL source: CNA overview
CWE(s)
CWE-20
Reserved
2026-04-20
Published
2026-05-12 17:19 UTC
Last updated
2026-05-14 21:54 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/41xxx/CVE-2026-41293.json
Linked Threat
CVE-2026-41293 — CVE-2026-41293

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-12 16:16:17 UTC
NVD last modified
2026-05-15 15:57:18 UTC
NVD CVSS v3.1
CVSS 9.8 / 10 9.8 9.8 / 10 CRITICAL source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore
3.9 / 10
Impact subscore
5.9 / 10
EPSS score
0.0025 (probability of exploitation in next 30 days)
EPSS percentile
48.63% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 10:16 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-29514
Assigner
apache
Published
May 12, 2026, 3:19:35 PM
Updated
May 14, 2026, 7:54:07 PM
EUVD base score (CVSS 3.1)
9.8 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EUVD-reported EPSS
0.2500
Vendors
Apache Software Foundation
Products
Apache Tomcat (8.5.0 ≤8.5.100)
Apache Tomcat (10.0.0-M1 ≤10.0.27)
Apache Tomcat (9.0.0.M1 ≤9.0.117)
Apache Tomcat (10.1.0-M1 ≤10.1.54)
Apache Tomcat (11.0.0-M1 ≤11.0.21)

ENISA description: Improper Input Validation vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 10.0.0-M1 through 10.0.27. Older, end of support versions may also be affected. Users are recommended to upgrade to version [FIXED_VERSION], which fixes the issue.

EUVD references (1)

Affected products (1)

VendorProductVersionsPlatforms
Apache Software Foundation Apache Tomcat 11.0.0-M1 (affected), 10.1.0-M1 (affected), 9.0.0.M1 (affected), 10.0.0-M1 (affected), 8.5.0 (affected)

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

  • cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

MITRE references (1) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (10)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (12)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • web:cvefinder.io

    CVSS 9.8, critical severity - Improper Input Validation vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 ... Get full vulnerability details, affected versions, exploit code, EPSS score, and mitigation strategies.

    2026-05-23 20:57 UTC
  • web:cybersecuritynews.com

    Google released a critical Chrome update fixing multiple high-risk vulnerabilities that could enable arbitrary code execution.

    2026-05-23 20:57 UTC
  • web:nvd.nist.gov

    Secure .gov websites use HTTPS A lock () or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

    2026-05-23 20:57 UTC
  • web:portal.msrc.microsoft.com

    The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

    2026-05-23 20:57 UTC
  • web:security-tracker.debian.org

    Vulnerable and fixed packages The table below lists information on source packages.

    2026-05-23 20:57 UTC
  • web:source.android.com

    This Section contains the available Android Security Bulletins, which provide fixes for possible issues affecting Android devices.

    2026-05-23 20:57 UTC
  • web:vuldb.com

    Organizations should prioritize immediate remediation through upgrading to the fixed version as recommended, as this represents the most effective mitigation strategy for eliminating the vulnerability.

    2026-05-23 20:57 UTC
  • web:www.oracle.com

    This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

    2026-05-23 20:57 UTC
  • web:www.suse.com

    Secure your Linux systems from CVE-2026-41293 . Stay ahead of potential threats with the latest security updates from SUSE.

    2026-05-23 20:57 UTC
  • web:www.thehackerwire.com

    How severe is CVE-2026-41293 ? What Apache products are affected by CVE-2026-41293 ? How do I fix or mitigate CVE-2026-41293 ? When was CVE-2026-41293 disclosed?

    2026-05-23 20:57 UTC
  • web:securityvulnerability.io

    Explore the improper input validation vulnerability affecting Apache Tomcat. Learn about CVE-2026-41293 and secure your systems today.

    2026-05-26 02:53 UTC
  • web:www.cve.org

    At cve .org, we provide the authoritative reference method for publicly known information-security vulnerabilities and exposures

    2026-05-26 02:53 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-41293.json.

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