Advisory record · GHSA-rhj7-vh3v-mcq6

Daptin: ParseAcceptLanguage `_` separator bypass enables >250x CPU amplification via Accept-Language header in LanguageMiddleware

CVSS 8.7 HighEPSS 0.0042 · 36th percentile

Published by the GitHub Advisory Database at 29 Oct 2026, 16:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/daptin/daptinGo<=0.12.15No fixed version yet
Identifiers
GHSA-rhj7-vh3v-mcq6 · CVE-2026-62160 · GO-2026-6890
Weakness (CWE)
CWE-400 · CWE-407
Published
29 Oct 2026
Updated
5 Nov 2026

Machine-written summary

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

Daptin versions up to and including 0.12.15 are vulnerable to denial of service through the Accept-Language header. An unauthenticated attacker who can reach the HTTP listener can send one request with a crafted header that makes the server use about 9 to 27 seconds of CPU per 256 KiB. No fixed version is listed.

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 0.0042, the 36th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:11 UTC First seen by agentprime
  2. 31 Oct 2026, 14:11 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.