Skip to main content
No exploitation reportedFix available

CVE-2025-52520

Apache Tomcat: DoS via integer overflow in multipart file upload

No exploitation reported by the sources we read.

  • Published2025-07-10
  • Fixed in11.0.9 · 10.1.43 · 9.0.107
  • WeaknessCWE-190

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

For some unlikely configurations of multipart upload, an Integer Overflow vulnerability in Apache Tomcat could lead to a DoS via bypassing of size limits. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.

Timeline

dates in UTC
  1. 2025-07-1019:15CVE publishedNVD

Versions per branch

NVD · OSV
Apache Tomcat
BranchAffectedFixed in
11.0≥ 11.0.0, < 11.0.911.0.9
11.0≥ 11.0.0-M1, < 11.0.911.0.9
10.1≥ 10.1.0, < 10.1.4310.1.43
10.x≥ 10.0.0, < 10.1.4310.1.43
10.1≥ 10.1.0-M1, < 10.1.4310.1.43
9.0≥ 9.0.0, < 9.0.1079.0.107
9.0< 9.0.1079.0.107
9.0≥ 9.0.0.M1, < 9.0.1079.0.107
8.5≥ 8.5.0, ≤ 8.5.100no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As apache, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • Apache Software Foundation Apache Tomcatother versions: not affected
    Affected
    • ≥ 11.0.0-M1, ≤ 11.0.8no fix statedsemver
    • ≥ 10.1.0-M1, ≤ 10.1.42no fix statedsemver
    • ≥ 9.0.0.M1, ≤ 9.0.106no fix statedsemver
    • ≥ 8.5.0, ≤ 8.5.100no fix statedsemver

    Not affected ≥ 6, < 8.5.0 (status unknown) · ≥ 10.0.0-M1, ≤ 10.0.27 (status unknown)

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2025-10-29

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • io.root.org.apache.tomcat:tomcat-catalinaRoot:Mavenall versions · fixed in 11.0.9-root.io.1
  • io.root.org.apache.tomcat:tomcat-catalinaRoot:Mavenall versions · fixed in 11.0.9-root.io.2
  • io.root.org.apache.tomcat:tomcat-catalinaRoot:Mavenall versions · fixed in 11.0.9-root.io.3
  • io.root.org.apache.tomcat.embed:tomcat-embed-coreRoot:Mavenall versions · fixed in 10.1.39-root.io.18
  • io.root.org.apache.tomcat.embed:tomcat-embed-coreRoot:Mavenall versions · fixed in 10.1.16-root.io.10
  • io.root.org.apache.tomcat.embed:tomcat-embed-coreRoot:Mavenall versions · fixed in 10.1.16-root.io.11
  • io.root.org.apache.tomcat.embed:tomcat-embed-coreRoot:Mavenall versions · fixed in 10.1.16-root.io.12
  • io.root.org.apache.tomcat.embed:tomcat-embed-coreRoot:Mavenall versions · fixed in 10.1.30-root.io.10

124 more package ranges on OSV.dev

Vendor advisories

  • CVE-2025-52520 Red Hat Product Security141 products fixed · 28 known affected

    tomcat: Apache Tomcat denial of service

    tomcat6 as a component of Red Hat Enterprise Linux 6 · tomcat6-admin-webapps as a component of Red Hat Enterprise Linux 6 · tomcat6-docs-webapp as a component of Red Hat Enterprise Linux 6 · +25 more

  • RHSA-2025:14180 Red Hat Product Security9 products fixed

    Red Hat Security Advisory: tomcat security update

  • RHSA-2025:14181 Red Hat Product Security9 products fixed

    Red Hat Security Advisory: tomcat security update

  • RHSA-2025:14183 Red Hat Product Security9 products fixed

    Red Hat Security Advisory: tomcat security update

  • RHSA-2025:14177 Red Hat Product Security9 products fixed

    Red Hat Security Advisory: tomcat security update

  • RHSA-2025:14182 Red Hat Product Security18 products fixed

    Red Hat Security Advisory: tomcat security update

6 more advisories

Full record on NVD

Fix

  1. Update Apache Tomcat to 11.0.9 · 10.1.43 · 9.0.107
  2. Vendor fix Red Hat Product Security RHSA-2025:14180 · 9 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Red Hat Product Security RHSA-2025:13685 · 33 productsBefore applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258
  4. Vendor fix Red Hat Product Security RHSA-2025:13686 · 1 productBefore applying the update, back up your existing Red Hat JBoss Web Server installation, including all applications and configuration files. The References section of this erratum contains a download link for the update. You must be logged in to download the update.
  5. Workaround from the vendor Red Hat Product Security RHSA-2025:14180 · 9 productsMitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2025-07-10
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-wr62-c79q-cv37

Frequently asked questions

What is CVE-2025-52520?

For some unlikely configurations of multipart upload, an Integer Overflow vulnerability in Apache Tomcat could lead to a DoS via bypassing of size limits. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.8, from 10.1.0-M1 through 10.1.42, from 9.0.0.M1 through 9.0.106. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 through 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.9, 10.1.43 or 9.0.107, which fix the issue.

Is CVE-2025-52520 actively exploited?

Active exploitation of CVE-2025-52520 has not been confirmed. Its EPSS score was 2.2% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-52520?

CVE-2025-52520 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Running Apache Tomcat? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record