Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Affected versions of the Go package google.golang.org/grpc before 1.83.1 are vulnerable to heap memory exhaustion. An unauthenticated remote attacker can open a stream and split the payload into a very large number of tiny HTTP/2 DATA frames, which inflates memory use per fragment and can cause an out-of-memory condition or runtime panic, a denial of service. Upgrade to version 1.83.1, which fixes the issue; receive buffer compaction is enabled by default and can be disabled via an environment variable, but the source notes that option will be removed later.
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 |
|---|---|---|---|---|
| 8.7 | High | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0061, the 49th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 19 Aug 2026, 07:21 UTC Published by the maintainers as a GitHub repository advisory
- 31 Oct 2026, 14:13 UTC First seen by agentprime
- 31 Oct 2026, 14:13 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-vp52-pcj8-j9qc
- OSV: GHSA-vp52-pcj8-j9qc
- github.com/grpc/grpc-go/security/advisories/GHSA-vp52-pcj8-j9qc
- nvd.nist.gov/vuln/detail/CVE-2026-84304
- github.com/grpc/grpc-go/pull/9331
- github.com/grpc/grpc-go/pull/9333
- github.com/grpc/grpc-go/commit/7354d9c8debb4bcf2225bf429857078de310c176
- github.com/grpc/grpc-go/commit/8cfeca0e1ee5ea0980dcc320e20240fa1079ec77
- github.com/grpc/grpc-go
- github.com/grpc/grpc-go/releases/tag/v1.83.1