High severity7.5NVD Advisory· Published Aug 13, 2026· Updated Sep 23, 2026
CVE-2026-73507
CVE-2026-73507
Description
Netty is an asynchronous, event-driven network application framework. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.xml.XmlFrameDecoder.decode() failed to preserve closing-tag parser state across invocations, so an unauthenticated remote attacker could trickle-feed repeated </ sequences that repeatedly rescanned the accumulated buffer and exhausted an EventLoop thread's CPU, causing denial of service with a maxFrameLength of 1 MB. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
io.netty:netty-codec-xmlMaven | >= 4.2.0.Final, < 4.2.16.Final | 4.2.16.Final |
io.netty:netty-codec-xmlMaven | < 4.1.136.Final | 4.1.136.Final |
Affected products
14- Range: <4.1.136.Final, <4.2.16.Final
- osv-coords12 versionspkg:apk/chainguard/apache-hoppkg:apk/chainguard/apache-hop-fipspkg:apk/chainguard/gremlin-serverpkg:apk/chainguard/management-api-for-apache-cassandra-5.0pkg:apk/chainguard/seata-serverpkg:apk/chainguard/tezpkg:apk/chainguard/thingsboard-tb-mqtt-transportpkg:apk/chainguard/thingsboard-tb-nodepkg:apk/wolfi/management-api-for-apache-cassandra-5.0pkg:apk/wolfi/tezpkg:apk/wolfi/thingsboard-tb-mqtt-transportpkg:apk/wolfi/thingsboard-tb-node
< 2.18.1-r8+ 11 more
- (no CPE)range: < 2.18.1-r8
- (no CPE)range: < 2.18.1-r6
- (no CPE)range: < 3.8.1-r2
- (no CPE)range: < 0.1.122-r2
- (no CPE)range: < 2.6.0-r21
- (no CPE)range: < 0.10.5-r23
- (no CPE)range: < 4.3.1.3-r7
- (no CPE)range: < 4.3.1.3-r7
- (no CPE)range: < 0.1.122-r2
- (no CPE)range: < 0.10.5-r23
- (no CPE)range: < 4.3.1.3-r7
- (no CPE)range: < 4.3.1.3-r7
Patches
Vulnerability mechanics
References
8- github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003bnvdPatchWEB
- github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6nvdPatchWEB
- github.com/advisories/GHSA-v74w-7mr3-4qg3ghsaADVISORY
- github.com/netty/netty/security/advisories/GHSA-v74w-7mr3-4qg3nvdVendor AdvisoryWEB
- github.com/netty/netty/pull/17063ghsaWEB
- github.com/netty/netty/pull/17065ghsaWEB
- github.com/netty/netty/releases/tag/netty-4.1.136.FinalnvdRelease NotesWEB
- github.com/netty/netty/releases/tag/netty-4.2.16.FinalnvdRelease NotesWEB
News mentions
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