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CVE-2019-9518 is an HTTP/2 uncontrolled-resource-consumption vulnerability affecting certain HTTP/2 implementations. A remote peer can transmit a continuous sequence of empty-payload DATA, HEADERS, CONTINUATION, and/or PUSH_PROMISE frames without setting the end-of-stream flag. Processing each frame imposes disproportionate work relative to the bandwidth required to send it, enabling CPU exhaustion and starvation of legitimate clients.
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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.
15 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An Undertow HTTP/2 denial-of-service vulnerability caused by empty-frame flooding and excessive resource consumption.
An HTTP/2 denial-of-service flaw in which empty-frame flooding causes excessive resource consumption.
Netty HTTP/2 denial-of-service vulnerability in which empty-frame flooding causes excessive resource consumption.
Netty HTTP/2 empty-frame flood that causes excessive resource consumption.
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.