CVE Tools
Sign in

CVE-2025-31650

Apache Tomcat: DoS via malformed HTTP/2 PRIORITY_UPDATE frame

Published: Apr 28, 2025Updated: Nov 3, 2025 Sources: CVE List NVD GHSA BDUCWE-459
NVD MITRE
7.5CVSSHIGH
EPSS Score
66.4%
Top 0.8%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

Improper Input Validation vulnerability in Apache Tomcat. Incorrect error handling for some invalid HTTP priority headers resulted in incomplete clean-up of the failed request which created a memory leak. A large number of such requests could trigger an OutOfMemoryException resulting in a denial of service. This issue affects Apache Tomcat: from 9.0.76 through 9.0.102, from 10.1.10 through 10.1.39, from 11.0.0-M2 through 11.0.5. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.90 though 8.5.100. Users are recommended to upgrade to version 9.0.104, 10.1.40 or 11.0.6 which fix the issue.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-459

Affected Products

Apache TomcatApache Software Foundation
On-premWeb App
Networking Infrastructure / load-balancer-proxy
tomcatapache
On-premWeb App
Networking Infrastructure / load-balancer-proxy
org.apache.tomcat:tomcat-coyoteMavenOSS Libraries
org.apache.tomcat.embed:tomcat-embed-coreMavenOSS Libraries
OpenSUSE LeapNovell Inc.
On-premOS
Operating Systems / linux-distro
apache software foundationoss-projectUSWeb & CMS Pluginsaka apache foundation
apacheoss-projectUSWeb & CMS Pluginsaka apache http server, apache httpd
mavenpackage-ecosystemOSS Libraries
novell inc.commercialUSOperating Systems
and 8 more affected products View all →

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

References

https://lists.apache.org/thread/j6zzk0y3yym9pzfzkq5vcyxzz0yzh826
lists.apache.org
http://www.openwall.com/lists/oss-security/2025/04/28/2
openwall.com
https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html
lists.debian.org
and 27 more references View all →

Timeline

Published
Apr 28, 2025
Last Updated
Nov 3, 2025

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2025-31650 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows