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CVE-2020-17509

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-01-11 · updated 2026-06-17
Weakness: CWE-444

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

Apache Software Foundation Apache Traffic Server: from 6.0.0 through 6.2.3; from 7.0.0 through 7.1.10; from 8.0.0 through 8.0.7

References

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