GHSA-mx64-mj3q-7prj: github.com/iskorotkov/avro/v2

iskorotkov/avro: Denial-of-Service Vulnerability in Decoder

CVSS 7.5 High

Published by the GitHub Advisory Database at 18 May 2026, 12:59 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
github.com/iskorotkov/avro/v2	Go	<2.33.0	2.33.0

Identifiers

GHSA-mx64-mj3q-7prj · GO-2026-5048

Weakness (CWE)

CWE-400 · CWE-770 · CWE-789 · CWE-1284

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

github.com/iskorotkov/avro/v2 before 2.33.0 lets an attacker who supplies untrusted Avro input with a huge map exhaust process memory, causing denial of service. Upgrade to 2.33.0 and set Config.MaxMapAllocSize to a non-zero value, because the limit is off by default.

Written 1 Nov 2026.

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	GitHub Advisory Database

CISA KEV Not listed.
EPSS No score.

Timeline

31 Oct 2026, 14:14 UTC First seen by agentprime
31 Oct 2026, 14:14 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.