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CVE-2026-40984 is a high-severity uncontrolled resource consumption vulnerability in Micrometer HTTP server instrumentations. Specially crafted HTTP requests can cause a denial-of-service condition in applications using vulnerable micrometer-core, micrometer-jetty11, or micrometer-jetty12 components with affected HTTP instrumentation configured and recording metrics. Affected micrometer-core versions are 1.9.0–1.9.17, 1.13.0–1.13.18, 1.14.0–1.14.15, 1.15.0–1.15.11, and 1.16.0–1.16.5. Affected micrometer-jetty11 and micrometer-jetty12 versions are 1.13.0–1.13.18, 1.14.0–1.14.15, 1.15.0–1.15.11, and 1.16.0–1.16.5.
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What an attacker gets, and what they’ve been doing with it.
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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.
19 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A high-severity, network-exploitable denial-of-service vulnerability in Micrometer. Specially crafted HTTP requests can cause a DoS condition, affecting specified versions of micrometer-core, micrometer-jetty11, and micrometer-jetty12.
A Micrometer denial of service vulnerability via specially crafted HTTP requests.
Micrometer denial of service vulnerability via specially crafted HTTP requests.
A denial-of-service vulnerability in Micrometer HTTP server instrumentations that can be triggered by specially crafted HTTP requests.
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.