Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
GHSA-wrvw-hg22-4m67 affects protobuf-java versions below 3.16.1, from 3.18.0 to below 3.18.2, and from 3.19.0 to below 3.19.2. Protobuf-kotlin and the google-protobuf gem (JRuby) are also affected. An attacker who can send a small crafted binary payload to an application that parses it can tie up the parser for minutes through repeated garbage collection pauses, causing denial of service. Upgrade protobuf-java to 3.16.1, 3.18.2, or 3.19.2, protobuf-kotlin to 3.18.2 or 3.19.2, and google-protobuf to 3.19.2.
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 |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA (Google) |
- CISA KEV Not listed.
- EPSS 0.018, the 78th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:18 UTC First seen by agentprime
- 31 Oct 2026, 14:18 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-wrvw-hg22-4m67
- OSV: GHSA-wrvw-hg22-4m67
- github.com/protocolbuffers/protobuf/security/advisories/GHSA-wrvw-hg22-4m67
- nvd.nist.gov/vuln/detail/CVE-2021-22569
- bugs.chromium.org/p/oss-fuzz/issues/detail?id=39330
- cloud.google.com/support/bulletins#gcp-2022-001
- github.com/protocolbuffers/protobuf
- www.oracle.com/security-alerts/cpuapr2022.html
- www.openwall.com/lists/oss-security/2022/01/12/4
- www.openwall.com/lists/oss-security/2022/01/12/7