Apache Traffic Control: ReDoS issue in Traffic Router configuration
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-1333.
Summary
** 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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache Traffic Control | all versions | — | No fix listed | CNA |
| — | github.com/apache/trafficcontrol/v8 (Go) | up to 8.0.2 | — | No fix listed | GHSA-9m49-p2j3-c6xm |
- Apache Traffic Control VendorApache Affected all versions Fixed in — No fix listed CNA
- github.com/apache/trafficcontrol/v8 (Go) Vendor— Affected up to 8.0.2 Fixed in — No fix listed GHSA-9m49-p2j3-c6xm
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-61581
- 2026-10-03 Alias added: GHSA-9m49-p2j3-c6xm
References
More Apache Traffic Control vulnerabilities
- TI-2024-30436 Apache Traffic Control: SQL Injection in Traffic Ops endpoint PUT deliveryservice_request_comments CVSS 3.1CRITICAL 9.9
- TI-2021-19325 LDAP filter injection vulnerability in Traffic Ops CVSS 3.1CRITICAL 9.8
- TI-2019-09251 Improper authentication in Apache Traffic Control CVSS 3.1CRITICAL 9.8
- TI-2017-05306 Uncontrolled resource consumption in Apache Traffic Control CVSS 3.0HIGH 7.5
- TI-2022-07358 Server-Side Request Forgery in Traffic Ops endpoint POST /user/login/oauth CVSS 3.1HIGH 7.5
- TI-2020-13271 Incorrect permission assignment in Apache Traffic Control CVSS 3.1MEDIUM 5.8
Sources
- CVE-2025-61581 · CVE Program
- CVE-2025-61581 · NVD
- FIRST EPSS
- GHSA-9m49-p2j3-c6xm · GitHub Advisory Database · CC BY 4.0
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