Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The Go module github.com/iskorotkov/avro/v2 is vulnerable in versions before 2.33.0. A remote, unauthenticated attacker who supplies a crafted Avro payload with a very large array or map block count followed by truncated data can make the decoder spin through a huge number of no-op iterations, pinning a CPU core. Upgrade to version 2.33.0 or later, and set Config.MaxSliceAllocSize and Config.MaxMapAllocSize for untrusted input.
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 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:14 UTC First seen by agentprime
- 31 Oct 2026, 14:14 UTC Confirmed by OSV