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Advisory record · GHSA-27qj-9gvp-8rh9

Packetbeat does not properly validate an array index in multiple protocol parser components

CVSS 5.7 MediumEPSS 0.0024 · 14th percentile

Published by the GitHub Advisory Database at 19 Mar 2026, 18:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/elastic/beats/v7Go<7.0.0-alpha2.0.20260126223743-dec1b31111ec7.0.0-alpha2.0.20260126223743-dec1b31111ec
Identifiers
GHSA-27qj-9gvp-8rh9 · CVE-2026-26933 · GO-2026-4789
Weakness (CWE)
CWE-129
Tags
Published
19 Mar 2026
Updated
10 Sept 2026

Machine-written summary

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

Packetbeat in github.com/elastic/beats/v7 versions before 7.0.0-alpha2.0.20260126223743-dec1b31111ec is affected by improper array index validation in several protocol parsers. An attacker who can send crafted, malformed packets to a monitored network interface, either from the same network segment or by controlling traffic routed to it, can trigger out-of-bounds reads that crash the application or exhaust resources. Upgrade to 7.0.0-alpha2.0.20260126223743-dec1b31111ec or later.

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
5.7 Medium 3.1 CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CNA (elastic)
  • CISA KEV Not listed.
  • EPSS 0.0024, the 14th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

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