Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The amqp-client Maven package, versions before 5.36.1, has a flaw in its JSON-RPC tooling where the JSONReader parser never terminates on input that ends inside a quoted string or a line comment. An attacker who can send a single message to a JSON-RPC server's request queue, or who controls a JSON-RPC service a client talks to, can hang the endpoint: an unterminated string exhausts the heap, and an unterminated comment pins a thread at full CPU. Upgrade to amqp-client 5.36.1 or later. Applications that supply their own mapper instead of the default DefaultJsonRpcMapper are not affected.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 4.9 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0053, the 45th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:16 UTC First seen by agentprime
- 31 Oct 2026, 14:16 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-cqgh-8p3p-mx4m
- OSV: GHSA-cqgh-8p3p-mx4m
- github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-cqgh-8p3p-mx4m
- nvd.nist.gov/vuln/detail/CVE-2026-106121
- github.com/rabbitmq/rabbitmq-java-client/pull/2100
- github.com/rabbitmq/rabbitmq-java-client/commit/25fad817291feff3195c32620117d295598f8b41
- github.com/rabbitmq/rabbitmq-java-client
- github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.37.0