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CVE-2026-58159 is a high-severity incorrect authorization vulnerability in Apache Traffic Server caused by flaws in listener handling and ACL matching. The issue allows IP-based access controls to be bypassed on Unix Domain Socket listeners and also permits authorization bypass through ACL matching errors. 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.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
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.
5 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.
An access control bypass vulnerability in Apache Traffic Server caused by IP access control bypass on UDS listeners and ACL matching errors.
An access-control bypass vulnerability in Apache Traffic Server involving UDS listeners and ACL matching errors.
An incorrect authorization vulnerability in Apache Traffic Server that allows access-control bypass due to listener and ACL handling errors.
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.