CVE catalog
CVE-2026-107227
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.2.0 until 3.0.14, WebSocket permessage-deflate decompressio
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.43% · Oct 25, 2026
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.2.0 until 3.0.14, WebSocket permessage-deflate decompression is unbounded when compression is enabled. The inbound pipeline aggregates compressed frames before WebSocketClientCompressionHandler inflates them, so webSocketMaxFrameSize and webSocketMaxBufferSize do not bound decompressed output. A malicious WebSocket peer can send a small compressed message that expands to a very large Netty buffer and exhausts JVM heap. This issue is fixed in version 3.0.14.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | async-http-client | sid | 2.12.3-1 | vulnerable |
| Debian | async-http-client | bookworm | 2.12.3-1 | vulnerable |
| Debian | async-http-client | bookworm-security | 2.12.3-1+deb12u1 | vulnerable |
| Maven | org.asynchttpclient:async-http-client | Not reported | Not reported | unknown |
Fixed-version evidence
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libasync-http-client-java]Affected
Source package: [async-http-client]
Details (4)
2.12.3-1· all · bookwormAffected
nvd · async-http-client · debian · bookworm; nvd · async-http-client · debian · 12
2.12.3-1· all · bookwormAffected
nvd · async-http-client · debian · bookworm; nvd · async-http-client · debian · 12
2.12.3-1+deb12u1· all · bookworm-securityAffected
nvd · async-http-client · debian · bookworm; nvd · async-http-client · debian · 12
2.12.3-1+deb12u1· all · bookworm-securityAffected
nvd · async-http-client · debian · bookworm; nvd · async-http-client · debian · 12
Observed:
References
- [https://github.com/advisories/GHSA-x8v2-478q-2hvg]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-107227]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-107227]
- [https://security-tracker.debian.org/tracker/CVE-2026-107227]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-107227.json]
[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]