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Vulnerability record · CVE-2025-61581 · published 16 October 2025

CVE-2025-61581: Apache traffic control inefficient regular expression (redos) vulnerability

Apache · Traffic Control

** UNSUPPORTED WHEN ASSIGNED ** Inefficient Regular Expression Complexity vulnerability in Apache Traffic Control. This issue affects Apache Traffic Control: all versions. People with access to the management interface of the Traffic Router component could specify malicious patterns and cause unavailability. As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

7.5 CVSS 3.1 High EPSS 0.74% · top 47.4% CWE-1333 · Inefficient regular expression (ReDoS)
7.5CVSS 3.1 base score
0.74%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

** UNSUPPORTED WHEN ASSIGNED ** Inefficient Regular Expression Complexity vulnerability in Apache Traffic Control. This issue affects Apache Traffic Control: all versions. People with access to the management interface of the Traffic Router component could specify malicious patterns and cause unavailability. As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://lists.apache.org/thread/mx2jxgnlop2f4vbqnvmrldh4pqmobxvp Mailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2025/10/16/3

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-43350Apache traffic control ldap injection vulnerabilityAn unauthenticated Apache Traffic Control Traffic Ops user can send a request with a specially-crafted username to the POST /login endpoint of any AP…EPSS 4.8%9.8CVE-2019-12405Apache traffic control improper authentication vulnerabilityImproper authentication is possible in Apache Traffic Control versions 3.0.0 and 3.0.1 if LDAP is enabled for login in the Traffic Ops API component.…EPSS 3.5%8.8CVE-2024-45387Apache traffic control sql injection vulnerabilityAn SQL injection vulnerability in Traffic Ops in Apache Traffic Control <= 8.0.1, >= 8.0.0 allows a privileged user with role "admin", "federation", …EPSS 42%7.5CVE-2022-23206Apache traffic control server-side request forgery (ssrf) vulnerabilityIn Apache Traffic Control Traffic Ops prior to 6.1.0 or 5.1.6, an unprivileged user who can reach Traffic Ops over HTTPS can send a specially-crafted…EPSS 2.0%7.5CVE-2017-7670Apache traffic control uncontrolled resource consumption vulnerabilityThe Traffic Router component of the incubating Apache Traffic Control project is vulnerable to a Slowloris style Denial of Service attack. TCP connec…EPSS 4.7%5.8CVE-2020-17522Apache traffic control incorrect permission assignment vulnerabilityWhen ORT (now via atstccfg) generates ip_allow.config files in Apache Traffic Control 3.0.0 to 3.1.0 and 4.0.0 to 4.1.0, those files include permissi…EPSS 3.9%4.3CVE-2021-42009Apache traffic control improper input validation vulnerabilityAn authenticated Apache Traffic Control Traffic Ops user with Portal-level privileges can send a request with a specially-crafted email subject to th…EPSS 2.8%

Source: NIST National Vulnerability Database (record CVE-2025-61581), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.