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Advisory record · GHSA-6gc3-crp7-25w5

gosaml2 vulnerable to Denial Of Service Via Deflate Decompression Bomb

CVSS 5.3 MediumEPSS 0.0096 · 61st percentile

Published by the GitHub Advisory Database at 2 Mar 2023, 23:12 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/russellhaering/gosaml2Go<0.9.00.9.0
Identifiers
GHSA-6gc3-crp7-25w5 · CVE-2023-26483 · GO-2023-1602
Weakness (CWE)
CWE-409
Tags
Published
2 Mar 2023
Updated
10 Sept 2026

Machine-written summary

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

Versions of the Go package github.com/russellhaering/gosaml2 before 0.9.0 are vulnerable to a denial of service. An attacker can send a deflate-compressed SAML request that uses far more memory during processing than its original size, which can exhaust memory and cause the process to be killed. Upgrade to version 0.9.0 or later. Limiting the size of request bodies passed to the library can reduce risk, but the source advises against relying on this.

Written 5 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
5.3 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0096, the 61st percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:43 UTC First seen by agentprime
  2. 31 Oct 2026, 14:43 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.