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CVE-2026-44891
7.5 HIGH
- CVSS version (CVSS): 3.1
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Privileges Required (PR): None (N)
- User Interaction (UI): None (N)
- Scope (S): Unchanged (U)
- Confidentiality (C): None (N)
- Integrity (I): None (N)
- Availability (A): High (H)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Privileges Required (MPR): None (N)
- Modified User Interaction (MUI): None (N)
- Modified Confidentiality (MC): None (N)
- Modified Scope (MS): Unchanged (U)
- Modified Integrity (MI): None (N)
- Modified Availability (MA): High (H)
Activity log
- Created & dismissed (no matching packages found) suggestion
Netty: Denial of Service via Unbounded Headers in StompSubframeDecoder
Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, io.netty.handler.codec.stomp.StompSubframeDecoder fails to limit the total number of headers or their cumulative size per frame, and the maxLineLength parameter only restricts individual header lines. An attacker can send a large number of short headers that are accumulated in memory inside DefaultStompHeadersSubframe until the JVM throws an OutOfMemoryError, causing denial of service for servers exposing a STOMP endpoint based on StompSubframeDecoder. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.
References
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https://github.com/netty/netty/security/advisories/GHSA-vhch-2wf3-m8rp x_refsource_CONFIRM
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https://github.com/netty/netty/pull/17063 x_refsource_MISC
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https://github.com/netty/netty/pull/17065 x_refsource_MISC
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https://github.com/netty/netty/releases/tag/netty-4.1.136.Final x_refsource_MISC
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https://github.com/netty/netty/releases/tag/netty-4.2.16.Final x_refsource_MISC
Affected products
netty
- ==>= 4.2.0.Final, < 4.2.16.Final
- ==< 4.1.136.Final