CVE-2020-13935
HIGH 7.5EPSS 86.6%
The payload length in a WebSocket frame was not correctly validated in Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M1 to 9.0.36, 8.5.0 to 8.5.56 and 7.0.27 to 7.0.104. Invalid payload lengths could trigger an infinite loop. Multiple requests with invalid payload lengths could lead to a denial of service.
- Affected
- Apache Tomcat
- CVSS v3.1 NVD
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS v2.0 NVD
- 5.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P - EPSS
- 86.61% chance of exploitation in the next 30 days, 100th percentile
- Nuclei
- high
- Published
- 2020-07-14
- Updated
- 2026-10-08
Proof-of-concept exploits (2)
- RedTeamPentesting/CVE-2020-13935168★ · 2020-11-02
- aabbcc19191/CVE-2020-139350★ · 2022-06-03
Nuclei templates (1)
Exploit collections (1)
- CVE-2020-13935 Apache Tomcat WebSocket 拒绝服务漏洞.mdtzwlhack/Vulnerability
Security advisories
- https://lists.apache.org/thread.html/rd48c72bd3255bda87564d4da3791517c074d94f8a701f93b857…
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00084.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00088.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10332
- https://lists.debian.org/debian-lts-announce/2020/07/msg00017.html
- https://security.netapp.com/advisory/ntap-20200724-0003
- https://usn.ubuntu.com/4448-1
- https://usn.ubuntu.com/4596-1
- https://www.debian.org/security/2020/dsa-4727
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- advisories/GHSA-m7jv-hq7h-mq7c