7.5

CVE-2025-31650: Apache Tomcat: DoS via malformed HTTP/2 PRIORITY_UPDATE frame

Modified
AliasesUBUNTU-CVE-2025-31650DEBIAN-CVE-2025-31650CGA-2xvm-4p5r-8vwx
Published 28-04-2025Last modified 03-11-2025

Vulnerability summary

CVE-2025-31650 is a high (CVSS 7.5) Incomplete Cleanup vulnerability in apache software foundation apache tomcat. EPSS estimates a 61.32% chance of exploitation in the next 30 days, higher than 99.1% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Prioritisepublic exploit

Public exploit (exploit-database, 05-06-2025)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
61.32%
0%100%
Critical · +0.28 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1exploit-database

Advisory lineage

Upstream 0 · Downstream 18 · Related 10
DLA-4244-1MGASA-2025-0145OPENSUSE-SU-2025:15048-1OPENSUSE-SU-2025:15049-1RHSA-2025:11332RHSA-2025:11333

Timeline

  1. 28-04-2025
    PublishedVulnerability first disclosed.
  2. 03-11-2025
    Last modifiedVulnerability information updated.

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 metrics

7 scores · 7 sources · 2 versions

EPSS trend

Probability

61.32%

Chance of exploitation in the next 30 days

Percentile

99%

Versus all other CVEs

30-day change

Increase +0.28 pp

From 61.04% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found
  • exploit-databaseremotemultipleUnverified

    Apache Tomcat 10.1.39 - Denial of Service (DoS)

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard8 products
  • camunda-zeebe-8.6< 8.6.15-r1
  • camunda-zeebe-8.6-compat< 8.6.15-r1
  • thingsboard< 4.0.1-r1
  • thingsboard-tb-js-executor< 4.0.1-r1
  • thingsboard-tb-mqtt-transport< 4.0.1-r1
Wolfi5 products
  • thingsboard< 4.0.1-r1
  • thingsboard-tb-js-executor< 4.0.1-r1
  • thingsboard-tb-mqtt-transport< 4.0.1-r1
  • thingsboard-tb-node< 4.0.1-r1
  • thingsboard-tb-web-ui< 4.0.1-r1
Debian3 products
  • tomcat10< 10.1.40-1
  • tomcat11< 11.0.6-1
  • tomcat9< 9.0.70-2
Apache1 product
  • tomcat≥ 9.0.76, < 9.0.104 | ≥ 10.1.10, < 10.1.40 | ≥ 11.0.1, < 11.0.6 | 11.0.0:milestone10 | 11.0.0:milestone11 | 11.0.0:milestone12 | 11.0.0:milestone13 | 11.0.0:milestone14 | 11.0.0:milestone15 | 11.0.0:milestone16 | 11.0.0:milestone17 | 11.0.0:milestone18 | 11.0.0:milestone19 | 11.0.0:milestone2 | 11.0.0:milestone20 | 11.0.0:milestone21 | 11.0.0:milestone22 | 11.0.0:milestone23 | 11.0.0:milestone24 | 11.0.0:milestone25 | 11.0.0:milestone3 | 11.0.0:milestone4 | 11.0.0:milestone5 | 11.0.0:milestone6 | 11.0.0:milestone7 | 11.0.0:milestone8 | 11.0.0:milestone9
Apache software foundation1 product
  • apache tomcat≥ 9.0.76, ≤ 9.0.102 | ≥ 10.1.10, ≤ 10.1.39 | ≥ 11.0.0-M2, ≤ 11.0.5 | ≥ 8.5.90, ≤ 8.5.100
Org.apache.tomcat1 product
  • tomcat-coyote≥ 9.0.76, < 9.0.104 | ≥ 10.1.10, < 10.1.40 | ≥ 11.0.0-M2, < 11.0.6 | ≥ 8.5.0, ≤ 8.5.100
Org.apache.tomcat.embed1 product
  • tomcat-embed-core≥ 9.0.76, < 9.0.104 | ≥ 10.1.10, < 10.1.40 | ≥ 11.0.0-M2, < 11.0.6 | ≥ 8.5.0, ≤ 8.5.100
Ubuntu1 product
  • tomcat10< 10.1.16-1ubuntu0.1~esm3

8 vendors · 21 products

References

22 links
Show all 22 references