Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The NestJS @nestjs/microservices package is affected in versions below 11.2.5 and from 12.0.0 up to 12.0.3 when it uses the built-in TCP transport. A peer that can reach the transport's port needs no credentials and can open connections and send or withhold data to make the server allocate memory without bound, eventually causing an out-of-memory kill; there is no confidentiality or integrity impact. Upgrade to 11.2.5 or 12.0.3. Users who cannot upgrade should restrict network access to the port, since the source's other workarounds only partly limit the problem.
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 |
|---|---|---|---|---|
| 6.5 | Medium | 3.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS No score.
Timeline
- 31 Oct 2026, 13:34 UTC First seen by agentprime
- 31 Oct 2026, 13:34 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-96h4-vgxj-gvm2
- OSV: GHSA-96h4-vgxj-gvm2
- github.com/nestjs/nest/security/advisories/GHSA-96h4-vgxj-gvm2
- github.com/nestjs/nest/pull/17746
- github.com/nestjs/nest/pull/17749
- github.com/nestjs/nest/commit/6ca2dd894a6ff964d318724f363061652e822920
- github.com/nestjs/nest/commit/781843ac98d429fe1d541c52c7126850be5989a7
- github.com/nestjs/nest/commit/dee4ed4dbc2e18e1e722619927647f5441dfe812
- github.com/nestjs/nest
- github.com/nestjs/nest/releases/tag/v11.2.5
- github.com/nestjs/nest/releases/tag/v12.0.3