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Advisory record · GHSA-mc57-h6j3-3hmv

iskorotkov/avro: Integer Overflow in Decoder

CVSS 8.7 HighEPSS 0.0055 · 46th percentile

Published by the GitHub Advisory Database at 18 May 2026, 16:22 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/iskorotkov/avro/v2Go<2.33.02.33.0
Identifiers
GHSA-mc57-h6j3-3hmv · CVE-2026-46384 · GO-2026-5047
Weakness (CWE)
CWE-190 · CWE-191 · CWE-681 · CWE-1284
Tags
Published
18 May 2026
Updated
10 Sept 2026

Machine-written summary

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

GHSA-mc57-h6j3-3hmv affects github.com/iskorotkov/avro/v2 versions before 2.33.0. An attacker who can supply an untrusted Avro stream can trigger integer overflow in the decoder, causing panics or bypassed size limits, which amounts to denial of service; on 32-bit targets, the wrong union branch can also be selected. Upgrade to version 2.33.0 or later. The source description is long and partly truncated, so details beyond these points are unclear.

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

ScoreRatingCVSSVectorSource
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 0.0055, the 46th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:13 UTC First seen by agentprime
  2. 31 Oct 2026, 14:13 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.