CVE-2026-78437

highpriority · track · 0EPSS 0.005 · 43 %ileDEFRUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.51% (43rd) EPSS

CVSS 7.3 · high

Is it mine?

11 products

Check your exposure

Who says so?

3 sources

cert_bund · osv · certfr

EPSS · scored 2026-10-27

Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail. This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.

cvss

Technical severity, 0–10. One row per scoring source.

7.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.7–7.3

v3.17.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondaryexploitability 3.9 · impact 3.4

v3.16.7mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-459US

affected products (11)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
F5 BIG-IPall versionscert_bundDEcpe:/a:f5:big-ip:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Apache Tomcat< 10.1.60cert_bundDE
Apache Tomcat< 11.0.26cert_bundDE
Apache Tomcat< 9.0.122cert_bundDE
Open Source Camunda< 7.24.16cert_bundDE
Bitnami tomcat10.1.53 → 10.1.60osvUSpkg:bitnami/tomcat
Bitnami tomcat11.0.19 → 11.0.26osvUSpkg:bitnami/tomcat
Bitnami tomcat9.0.116 → 9.0.122osvUSpkg:bitnami/tomcat

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3527Apache Tomcat: Mehrere SchwachstellenDeutsch2026-09-22csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Apache Tomcat ausnutzen, um Sicherheitsvorkehrungen zu umgehen, um einen Denial of Service Angriff durchzuführen und um Daten zu manipulieren.
BIT-tomcat-2026-78437Apache Tomcat: HTTP/2 DoS via malformed request2026-10-01vendor · osvUS
Incomplete cleanup vulnerability in Apache Tomcat allows a malformed request to potentially (depends on timing) cause one request from another user to fail. This issue affects Apache Tomcat: from 11.0.19 through 11.0.25, from 10.1.53 through 10.1.59, from 9.0.116 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
CERTFR-2026-AVI-1336Multiples vulnérabilités dans les produits IBMFrançais2026-10-16vendor · certfrFR
CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR

sources

Which sources assert this record, and when.

cert_bund osv certfr NVD CVE.org MITRE

published 2026-09-23modified 2026-09-23

references (2) nvd

External citations — patches, advisories, analysis.

scry

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