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CVE-2025-48988: Apache Tomcat: FileUpload large number of parts with headers DoS

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 30.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-16 · updated 2026-06-17
• Weakness: CWE-770

Description

Allocation of Resources Without Limits or Throttling vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.7, from 10.1.0-M1 through 10.1.41, from 9.0.0.M1 through 9.0.105. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.8, 10.1.42 or 9.0.106, which fix the issue.

Affected products

• Apache Tomcat: from 9.0.0 before 9.0.106; from 10.1.0 before 10.1.42; from 11.0.0 before 11.0.8 — fixed in 10.1.42, 11.0.8, 9.0.106

How to fix

Upgrade to a fixed version: Apache Tomcat 10.1.42, 11.0.8, 9.0.106. Check the vendor advisory for mitigations.

References

• https://lists.apache.org/thread/nzkqsok8t42qofgqfmck536mtyzygp18
• http://www.openwall.com/lists/oss-security/2025/06/16/1
• https://lists.debian.org/debian-lts-announce/2025/07/msg00009.html

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