Eclipse Jetty up to 10.0.31/11.0.31/12.0.37/12.1.11 WebSocket Frame heap-based overflow

Summaryinfo

A vulnerability, which was classified as problematic, was found in Eclipse Jetty up to 10.0.31/11.0.31/12.0.37/12.1.11. This vulnerability affects unknown code of the component WebSocket Frame Handler. The manipulation results in heap-based overflow. This vulnerability is cataloged as CVE-2026-19204. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Eclipse Jetty up to 10.0.31/11.0.31/12.0.37/12.1.11. It has been classified as problematic. Affected is some unknown functionality of the component WebSocket Frame Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on availability. CVE summarizes:

A client may send a WebSocket frame with an unknown opcode and a very large declared payload length, causing Jetty to attempt a large memory allocation and potentially exhaust the JVM heap. This occurs when auto-fragmentation is enabled, as unknown opcodes bypass the normal maximum frame size handling and payload allocation occurs before the opcode is validated.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-19204 since 08/07/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/07/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Eclipse

Name

• Jetty

Version

• 10.0.0
• 10.0.1
• 10.0.2
• 10.0.3
• 10.0.4
• 10.0.5
• 10.0.6
• 10.0.7
• 10.0.8
• 10.0.9
• 10.0.10
• 10.0.11
• 10.0.12
• 10.0.13
• 10.0.14
• 10.0.15
• 10.0.16
• 10.0.17
• 10.0.18
• 10.0.19
• 10.0.20
• 10.0.21
• 10.0.22
• 10.0.23
• 10.0.24
• 10.0.25
• 10.0.26
• 10.0.27
• 10.0.28
• 10.0.29
• 10.0.30
• 10.0.31
• 11.0.0
• 11.0.1
• 11.0.2
• 11.0.3
• 11.0.4
• 11.0.5
• 11.0.6
• 11.0.7
• 11.0.8
• 11.0.9
• 11.0.10
• 11.0.11
• 11.0.12
• 11.0.13
• 11.0.14
• 11.0.15
• 11.0.16
• 11.0.17
• 11.0.18
• 11.0.19
• 11.0.20
• 11.0.21
• 11.0.22
• 11.0.23
• 11.0.24
• 11.0.25
• 11.0.26
• 11.0.27
• 11.0.28
• 11.0.29
• 11.0.30
• 11.0.31
• 12.0.0
• 12.0.1
• 12.0.2
• 12.0.3
• 12.0.4
• 12.0.5
• 12.0.6
• 12.0.7
• 12.0.8
• 12.0.9
• 12.0.10
• 12.0.11
• 12.0.12
• 12.0.13
• 12.0.14
• 12.0.15
• 12.0.16
• 12.0.17
• 12.0.18
• 12.0.19
• 12.0.20
• 12.0.21
• 12.0.22
• 12.0.23
• 12.0.24
• 12.0.25
• 12.0.26
• 12.0.27
• 12.0.28
• 12.0.29
• 12.0.30
• 12.0.31
• 12.0.32
• 12.0.33
• 12.0.34
• 12.0.35
• 12.0.36
• 12.0.37
• 12.1.0
• 12.1.1
• 12.1.2
• 12.1.3
• 12.1.4
• 12.1.5
• 12.1.6
• 12.1.7
• 12.1.8
• 12.1.9
• 12.1.10
• 12.1.11

License

• free

CPE 2.3info

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CPE 2.2info

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