Improper input validation in Apache Traffic Server
Priority MEDIUM 41CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
There is a vulnerability in Apache Traffic Server (ATS) 6.2.0 and prior and 7.0.0 and prior with the Host header and line folding. This can have issues when interacting with upstream proxies and the wrong host being used.
Why it matters now
EPSS 0.01933 80th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache Traffic Server | up to 6.2.0; up to 7.0.0 | — | No fix listed | CNA |
- Apache Traffic Server VendorApache Affected up to 6.2.0; up to 7.0.0 Fixed in — No fix listed CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:* | up to 6.2.0 | Vulnerable | Apache |
| cpe:2.3:a:apache:traffic_server:6.2.1:*:*:*:*:*:*:* | 6.2.1 | Vulnerable | Apache |
| cpe:2.3:a:apache:traffic_server:6.2.1:rc0:*:*:*:*:*:* | 6.2.1 rc0 | Vulnerable | Apache |
| cpe:2.3:a:apache:traffic_server:6.2.2:*:*:*:*:*:*:* | 6.2.2 | Vulnerable | Apache |
| cpe:2.3:a:apache:traffic_server:6.2.2:rc0:*:*:*:*:*:* | 6.2.2 rc0 | Vulnerable | Apache |
| cpe:2.3:a:apache:traffic_server:7.0.0:*:*:*:*:*:*:* | 7.0.0 | Vulnerable | Apache |
| cpe:2.3:a:apache:traffic_server:7.0.0:rc0:*:*:*:*:*:* | 7.0.0 rc0 | Vulnerable | Apache |
| cpe:2.3:a:apache:traffic_server:7.0.0:rc1:*:*:*:*:*:* | 7.0.0 rc1 | Vulnerable | Apache |
| cpe:2.3:a:apache:traffic_server:7.0.0:rc2:*:*:*:*:*:* | 7.0.0 rc2 | Vulnerable | Apache |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
- cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:* Versions up to 6.2.0 Vulnerable ·Apache
- cpe:2.3:a:apache:traffic_server:6.2.1:*:*:*:*:*:*:* Versions 6.2.1 Vulnerable ·Apache
- cpe:2.3:a:apache:traffic_server:6.2.1:rc0:*:*:*:*:*:* Versions 6.2.1 rc0 Vulnerable ·Apache
- cpe:2.3:a:apache:traffic_server:6.2.2:*:*:*:*:*:*:* Versions 6.2.2 Vulnerable ·Apache
- cpe:2.3:a:apache:traffic_server:6.2.2:rc0:*:*:*:*:*:* Versions 6.2.2 rc0 Vulnerable ·Apache
- cpe:2.3:a:apache:traffic_server:7.0.0:*:*:*:*:*:*:* Versions 7.0.0 Vulnerable ·Apache
- cpe:2.3:a:apache:traffic_server:7.0.0:rc0:*:*:*:*:*:* Versions 7.0.0 rc0 Vulnerable ·Apache
- cpe:2.3:a:apache:traffic_server:7.0.0:rc1:*:*:*:*:*:* Versions 7.0.0 rc1 Vulnerable ·Apache
- cpe:2.3:a:apache:traffic_server:7.0.0:rc2:*:*:*:*:*:* Versions 7.0.0 rc2 Vulnerable ·Apache
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
Remediation
No fixed version listed by the sources yet.
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Apache Traffic Server — DSA-4128
2 records Highest priority Priority MEDIUM 1 MEDIUM, 1 LOW
Other records, highest priority first
- TI-2017-05307 Improper input validation in Apache Traffic ServerPriority LOW 37
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2017-5660
- 2026-10-03 Alias added: GHSA-6qxx-fh8v-m9jv
References
More Apache Traffic Server vulnerabilities
- TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
- TI-2024-20685 Apache Traffic Server: HTTP/2 CONTINUATION frames can be utilized for DoS attack CVSS 3.1HIGH 7.5
- TI-2019-06950 Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a… CVSS 3.1HIGH 7.5
- TI-2019-06949 Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a… CVSS 3.1HIGH 7.5
- TI-2019-06947 Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a… CVSS 3.1HIGH 7.5
- TI-2023-20588 Apache Traffic Server: Malformed http/2 frames can cause an abort CVSS 3.1HIGH 7.5
Sources
- CVE-2017-5660 · CVE Program
- CVE-2017-5660 · NVD
- FIRST EPSS
- GHSA-6qxx-fh8v-m9jv · GitHub Advisory Database · CC BY 4.0
- CVE-2017-5660 · Red Hat security data · CC BY 4.0
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