TI-2020-13259 Aliases CVE-2020-17509 GHSA-wgc8-c98w-8fvh

ATS negative cache option is vulnerable to a cache poisoning attack.

LOW 36CWE-444Published 2021-01-11 · Updated 2024-08-04

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 3.1 · NVD. Fix status from CNA.

Summary

ATS negative cache option is vulnerable to a cache poisoning attack. If you have this option enabled, please upgrade or disable this feature. Apache Traffic Server versions 7.0.0 to 7.1.11 and 8.0.0 to 8.1.0 are affected.

Why it matters now

EPSS 0.01814 78th 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 Traffic Server	Apache Traffic Server 7.0.0 to 7.1.11, 8.0.0 to 8.1.0	—	No fix listed	CNA

Apache Traffic Server Vendor— Affected Apache Traffic Server 7.0.0 to 7.1.11, 8.0.0 to 8.1.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:apache:traffic_server::::::::	6.0.0 – 6.2.3; 7.0.0 – 7.1.10; 8.0.0 – 8.0.7	Vulnerable	Apache

cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:* Versions 6.0.0 – 6.2.3; 7.0.0 – 7.1.10; 8.0.0 – 8.0.7 Vulnerable ·Apache

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2020-17509
2026-10-03 Alias added: GHSA-wgc8-c98w-8fvh

References

Advisory 1

https://lists.apache.org/thread.html/raa9f0589c26c4d146646425e51e2a33e1457492df9f7ea2019daa6d3%40%3Cannounce.trafficserver.apache.org%3E

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

See all 120 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences