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Advisory record · GHSA-456h-ww26-f758

Tinyauth: User enumeration attack by timing oracle

CVSS 6.9 MediumEPSS 0.0063 · 50th percentile

Published by the GitHub Advisory Database at 22 Sept 2026, 20:37 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/tinyauthapp/tinyauthGo<1.0.1-0.20260714134959-c22925c2fba91.0.1-0.20260714134959-c22925c2fba9
Identifiers
GHSA-456h-ww26-f758 · CVE-2026-77582 · GO-2026-6555
Weakness (CWE)
CWE-208
Tags
Published
22 Sept 2026
Updated
1 Oct 2026

Machine-written summary

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

Tinyauth, Go module github.com/tinyauthapp/tinyauth, versions before 1.0.1-0.20260714134959-c22925c2fba9, lets a remote attacker tell whether a local username exists by timing login attempts. Login with a nonexistent user returns much faster than with an existing user, so the difference reveals valid accounts. Upgrade to 1.0.1-0.20260714134959-c22925c2fba9 or later. The source does not list a workaround.

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
6.9 Medium 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0063, the 50th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:12 UTC First seen by agentprime
  2. 31 Oct 2026, 14:12 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.