CVE-2026-24880

highpriority · track · 10EPSS 0.007 · 53 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.70% (53rd) EPSS

CVSS 7.5 · high

Is it mine?

51 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat via invalid chunk extension. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M1 through 9.0.115, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other, unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.20, 10.1.52 or 9.0.116, which fix the issue.

cvss

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

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondaryexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · OSV

v3.17.1highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Psecondary · 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-444USCWE-444USCWE-444US

exploits (1)

Public proof-of-concept and weaponised exploit code.

xiaoqiMikko/tomcat-line-checkCVE-2026-24880: does Apache's upgrade advice actually apply to your Tomcat? Detects the fix by class presence, not version comparison. Covers 7.0/8.0/8.5/9.0/10.0/10.1/11.0 lines.PoC · poc_in_github

affected products (51)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
HCL Commerce 9.1.0-9.1.19.0all versionscert_bundDEcpe:/a:hcltechsw:commerce:9.1.0_-_9.1.19.0
IBM Power Hardware Management Consoleall versionscert_bundDEcpe:/a:ibm:hardware_management_console:-
IBM QRadar SIEMall versionscert_bundDEcpe:/a:ibm:qradar_siem:-
IBM Spectrum Protect Plusall versionscert_bundDEcpe:/a:ibm:spectrum_protect_plus:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Apache Tomcat≤ Native <1.3.7cert_bundDE
Apache Tomcat≤ Native <2.0.14cert_bundDE
Apache Tomcat< 10.1.52cert_bundDE
Apache Tomcat< 10.1.53cert_bundDE
Apache Tomcat< 10.1.54cert_bundDE
Apache Tomcat< 11.0.19cert_bundDE
Apache Tomcat< 11.0.20cert_bundDE
Apache Tomcat< 11.0.21cert_bundDE
Apache Tomcat< 9.0.116cert_bundDE

showing 20 of 51

advisories (5)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-1038Apache Tomcat und Tomcat Native: Mehrere SchwachstellenDeutsch2026-04-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Apache Tomcat ausnutzen, um Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren, vertrauliche Informationen offenzulegen, Open-Redirect-Angriffe durchzuführen und andere, nicht näher spezifizierte Angriffe auszuführen.
WID-SEC-W-2026-1229Atlassian Bamboo, Bitbucket, Confluence, Jira: Mehrere SchwachstellenDeutsch2026-04-21csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Atlassian Bamboo, Atlassian Bitbucket, Atlassian Confluence und Atlassian Jira ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, Daten zu manipulieren oder offenzulegen oder Cross-Site-Scripting-Angriffe durchzuführen.
WID-SEC-W-2026-1608Atlassian Produkte (Bamboo, Bitbucket, Confluence, Crucible, Fisheye und Jira): Mehrere SchwachstellenDeutsch2026-05-19csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Atlassian Bamboo, Atlassian Bitbucket, Atlassian Confluence, Atlassian Crucible, Atlassian Fisheye und Atlassian Jira ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um einen Cross-Site Scripting Angriff durchzuführen, und um Sicherheitsvorkehrungen zu umgehen.
GHSA-563x-q5rq-57qpApache Tomcat has an HTTP Request/Response Smuggling vulnerability2026-04-09ghsa · osvUS
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat via invalid chunk extension. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.18, from 10.1.0-M1 through 10.1.52, from 9.0.0.M1 through 9.0.115, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other, unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.20, 10.1.52 or 9.0.116, which fix the issue.
BIT-tomcat-2026-24880Apache Tomcat: Request smuggling via invalid chunk extension2026-09-11vendor · osvUS
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat via invalid chunk extension. This issue affects Apache Tomcat: from 11.0.0 through 11.0.18, from 10.1.0 through 10.1.52, from 9.0.0 through 9.0.115, from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other, unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.20, 10.1.52 or 9.0.116, which fix the issue.

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv cert_bund NVD CVE.org MITRE

published 2026-04-09modified 2026-10-26

references (6)

External citations — patches, advisories, analysis.

scry

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