Apache Tomcat Path Equivalence Vulnerability
Path Equivalence: 'file.Name' (Internal Dot) leading to Remote Code Execution and/or Information disclosure and/or malicious content added to uploaded files via write enabled Default Servlet in Apache Tomcat. This issue affects Apache…
Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.
Exploitation probability EPSS · FIRST
Exploitation signals 4 / 5
- KEV catalog (CISA)01 Apr 2025
- Exploited in EUVD (ENISA)01 Apr 2025
- Used by ransomwareno
- EPSS above 10 %99.9%
- No account, over the networkyes
What to do
Fix
Apply the vendor’s fix as soon as it is available.
CISA guidance: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Meanwhile
Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.
Manufacturers (CRA)
Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained
Description ENISA EUVD
Path Equivalence: 'file.Name' (Internal Dot) leading to Remote Code Execution and/or Information disclosure and/or malicious content added to uploaded files via write enabled Default Servlet in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.2, from 10.1.0-M1 through 10.1.34, from 9.0.0.M1 through 9.0.98. 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. If all of the following were true, a malicious user was able to view security sensitive files and/or inject content into those files: - writes enabled for the default servlet (disabled by default) - support for partial PUT (enabled by default) - a target URL for security sensitive uploads that was a sub-directory of a target URL for public uploads - attacker knowledge of the names of security sensitive files being uploaded - the security sensitive files also being uploaded via partial PUT If all of the following were true, a malicious user was able to perform remote code execution: - writes enabled for the default servlet (disabled by default) - support for partial PUT (enabled by default) - application was using Tomcat's file based session persistence with the default storage location - application included a library that may be leveraged in a deserialization attack Users are recommended to upgrade to version 11.0.3, 10.1.35 or 9.0.99, which fixes the issue.
Affected products
- 8.5.0 ≤8.5.100
- 9.0.0.M1 ≤9.0.98
- 11.0.0-M1 ≤11.0.2
- 10.1.0-M1 ≤10.1.34
Open source packages OSV
Affected libraries according to OSV, with fixed versions.
Timeline
-
Published
-
Exploitation reported (ENISA)
-
Added to the KEV catalog
-
CISA remediation due date
-
EPSS peak: 99.9%
References
Other exploited vulnerabilities from the same vendor
- CVE-2016-3081Apache Struts Command Injection Vulnerability8.5 · Rising fast
- CVE-2026-34486Apache Tomcat Missing Encryption of Sensitive Data Vulnerability8.4 · Actively exploited
- CVE-2026-34197Apache ActiveMQ Improper Input Validation Vulnerability8.3 · Background exploitation
- CVE-2024-38475Apache HTTP Server Improper Escaping of Output Vulnerability9.0 · Background exploitation
- CVE-2024-45195Apache OFBiz Forced Browsing Vulnerability9.3 · Background exploitation
- CVE-2024-27348Apache HugeGraph-Server Improper Access Control Vulnerability9.3 · Background exploitation