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High severity7.5NVD Advisory· Published Jan 11, 2021· Updated Jun 17, 2026

CVE-2020-17509

CVE-2020-17509

Description

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.

Affected products

3
  • Apache/trafficserver3 versions
    cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*+ 2 more
    • cpe:2.3:a:apache:traffic_server:*:*:*:*:*:*:*:*range: >=6.0.0,<=6.2.3
    • (no CPE)
    • (no CPE)range: 7.0.0 to 7.1.11 and 8.0.0 to 8.1.0

Patches

Vulnerability mechanics

References

1

News mentions

0

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