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    CVE-2025-61581

    ** 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.

    Published:Oct 16, 2025
    Last Modified:Nov 4, 2025
    EPS:Oct 16, 2025
    EPSS Score:0.00177
    CVSS Score:7.5

    Affected Products

    Vendor
    Apache
    Product
    Traffic Control

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-492 Regular Expression Exponential Blowup

    Related CVEs

    CVE-2024-45387 (CVSS 9.9) — An SQL injection vulnerability in Traffic Ops in Apache Traffic Control <= 8.0.1, >= 8.0.0 allows a privileged…
    CVE-2022-23206 (CVSS 7.5) — In Apache Traffic Control Traffic Ops prior to 6.1.0 or 5.1.6, an unprivileged user who can reach Traffic Ops …
    CVE-2021-43350 (CVSS 9.8) — An unauthenticated Apache Traffic Control Traffic Ops user can send a request with a specially-crafted usernam…
    CVE-2021-42009 (CVSS 4.3) — An authenticated Apache Traffic Control Traffic Ops user with Portal-level privileges can send a request with …
    CVE-2020-17522 (CVSS 5.8) — When ORT (now via atstccfg) generates ip_allow.config files in Apache Traffic Control 3.0.0 to 3.1.0 and 4.0.0…
    CVE-2019-12405 (CVSS 9.8) — Improper authentication is possible in Apache Traffic Control versions 3.0.0 and 3.0.1 if LDAP is enabled for …
    CVE-2017-7670 (CVSS 7.5) — The Traffic Router component of the incubating Apache Traffic Control project is vulnerable to a Slowloris sty…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High