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CVE-2026-58158 is a vulnerability in Apache Traffic Server caused by improper handling of PROXY protocol input during parsing. The flaw truncates port values and can trigger a stack-based buffer overflow while processing crafted PROXY protocol data. Affected versions are 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. The issue is classified as CWE-121 and primarily affects the availability of the service by allowing malformed network input to corrupt stack memory during request handling.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability referenced in a Fedora security update for the trafficserver package; no further technical details are provided in the content.
A vulnerability referenced in a Fedora security update for the trafficserver package; specific technical details are not provided in the content.
A critical or high-severity vulnerability in Apache Traffic Server addressed by released security updates.
A stack overflow vulnerability in Apache Traffic Server caused by mishandling PROXY protocol input, which can truncate ports and overflow the stack, impacting availability.
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.