What’s Vulnerable › Vulnerabilities
CVE-2026-58153: Apache Traffic Server: HTTP/2 to HTTP/1 conversion forwards origin trailers to clients unsafely
- Severity: high (CVSS 8.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.6% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-07-29 · updated 2026-10-23
- Weakness: CWE-444
Description
Apache Traffic Server forwards HTTP/2 origin trailers to HTTP/1 clients without proper chunked framing when converting HTTP/2 to HTTP/1. This issue affects Apache Traffic Server: from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.
Affected products
- Apache Software Foundation Apache Traffic Server: from 10.0.0 before 10.1.4 — fixed in 10.1.4
How to fix
Upgrade to a fixed version: Apache Software Foundation Apache Traffic Server 10.1.4. Check the vendor advisory for mitigations.
References
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