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CVE-2026-58150 is a request smuggling vulnerability in Apache Traffic Server caused by improper handling of the Transfer-Encoding header in HTTP/2 requests. Apache Traffic Server fails to reject Transfer-Encoding when processing HTTP/2 traffic, even though this header is not valid for framing semantics in HTTP/2. This can create inconsistent interpretation of a request when Traffic Server downgrades or translates HTTP/2 traffic toward an HTTP/1 backend or intermediary, enabling downgrade request smuggling. The issue affects Apache Traffic Server 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical or high-severity vulnerability in Apache Traffic Server addressed by released security updates.
A request smuggling vulnerability in Apache Traffic Server caused by failure to reject Transfer-Encoding in HTTP/2 requests, enabling downgrade request smuggling.
A request smuggling vulnerability in Apache Traffic Server caused by accepting Transfer-Encoding in HTTP/2 requests.
A critical request smuggling vulnerability in Apache Traffic Server caused by improper handling of Transfer-Encoding headers in HTTP/2 requests, enabling downgrade request smuggling.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.