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CVE-2026-85721 is an uncontrolled resource-allocation vulnerability in AsyncHttpClient automatic HTTP response decompression. On the HTTP/1.1 path, ChannelManager installs an Http1ContentDecompressor that does not enforce a cumulative decompressed-output limit for an entire response. A compressed response can therefore expand across arbitrarily many chunks until the Java heap is exhausted. gzip, deflate, and snappy response encodings are affected; brotli and zstd are also affected when their optional codecs are installed. AsyncHttpClient 3.0.8 through 3.0.10 also have unbounded HTTP/2 decompression.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A network-accessible, low-complexity vulnerability affecting Debian Linux 12.0, including the async-http-client package. The supplied CVSS v3 vector indicates no privileges or user interaction are required and impacts availability only (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
An unbounded HTTP response decompression vulnerability in AsyncHttpClient that permits a malicious compressed response to exhaust client memory and cause a denial of service.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.