CVE-2020-13935
Multiple requests with invalid payload lengths could lead to a denial of service.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 86.6%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 86.61% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Affected
- apache/tomcat · debian/debian linux · netapp/oncommand system manager · opensuse/leap · canonical/ubuntu linux · mcafee/epolicy orchestrator · oracle/agile engineering data management · oracle/agile product lifecycle management · oracle/blockchain platform · oracle/commerce guided search · oracle/communications cloud native core policy · oracle/communications instant messaging server · oracle/fmw platform · oracle/instantis enterprisetrack · oracle/managed file transfer · oracle/mysql enterprise monitor · oracle/siebel ui framework · oracle/workload manager
- Source
- security@apache.org
EPSS 86.6% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00084.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00088.htmlMailing List, Third Party Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10332Third Party Advisory
- https://lists.apache.org/thread.html/r4e5d3c09f4dd2923191e972408b40fb8b42dbff0bc7904d44b651e50%40%3Cusers.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rd48c72bd3255bda87564d4da3791517c074d94f8a701f93b85752651%40%3Cannounce.tomcat.apache.org%3EMailing List, Release Notes, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00017.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200724-0003/Third Party Advisory
- https://usn.ubuntu.com/4448-1/Third Party Advisory
- https://usn.ubuntu.com/4596-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4727Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2020.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2021.htmlNot Applicable, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00084.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00088.htmlMailing List, Third Party Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10332Third Party Advisory
- https://lists.apache.org/thread.html/r4e5d3c09f4dd2923191e972408b40fb8b42dbff0bc7904d44b651e50%40%3Cusers.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rd48c72bd3255bda87564d4da3791517c074d94f8a701f93b85752651%40%3Cannounce.tomcat.apache.org%3EMailing List, Release Notes, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00017.htmlMailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200724-0003/Third Party Advisory
- https://usn.ubuntu.com/4448-1/Third Party Advisory
- https://usn.ubuntu.com/4596-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4727Third Party Advisory
- https://www.oracle.com//security-alerts/cpujul2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.htmlPatch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.