This report was translated by AI; nobody has reviewed the translation yet. Original language: Czech.

[TLP:CLEAR] Apache Tomcat fixes 2 vulnerabilities

Apache Software Foundation fixes 2 vulnerabilities in Apache Tomcat with versions 11.0.6, 10.1.40 and 9.0.104 [1][2].

Apache Tomcat - DoS (CVE-2025-31650)
CVSS 7.5 (High)

Allows an unauthenticated remote attacker, due to improper error handling when processing invalid HTTP priority headers, to cause a memory leak, which with a larger number of malformed requests can lead to memory exhaustion and a DoS attack [1].

The vulnerability is present in product:

  • Apache Tomcat; >=11.0.0-M2, <=11.0.5; >=10.1.10, <=10.1.39; >=9.0.76, <=9.0.102

CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

More information:

The vulnerability was publicly disclosed 28. 4. 2025.

Apache Tomcat - rewrite rule bypass (CVE-2025-31651)
CVSS 9.8 (Critical)

Allows an unauthenticated remote attacker, due to a flaw in rewrite rules, to bypass security restrictions in certain configurations [2].

The vulnerability is present in product:

  • Apache Tomcat; >=11.0.0-M2, <=11.0.5; >=10.1.10, <=10.1.39; >=9.0.76, <=9.0.102

CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

More information:

The vulnerability was publicly disclosed 28. 4. 2025.


By CESNET, z.s.p.o. Michaela Jarošová on 29. 4. 2025.

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