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Advisory record · GHSA-fpv6-f8jw-rc3r

Elvish vulnerable to remote code execution via the web UI backend

CVSS 8.0 HighEPSS 0.0054 · 45th percentile

Published by the GitHub Advisory Database at 23 Sept 2021, 23:17 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/elves/elvishGo<0.14.00.14.0
Identifiers
GHSA-fpv6-f8jw-rc3r · CVE-2021-41088 · GO-2022-0937
Weakness (CWE)
CWE-346 · CWE-668
Tags
Published
23 Sept 2021
Updated
8 Jul 2026

Machine-written summary

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

Elvish versions before 0.14.0 are vulnerable through the experimental web UI backend, which is started with elvish -web. If a user has that backend running and visits a malicious website, the site can send arbitrary code to an endpoint on localhost because request origins are not checked correctly, allowing remote code execution. Upgrade to Elvish 0.14.0 or later, which no longer includes the experimental web UI; if upgrading is not possible, do not use the experimental web UI.

Written 6 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
8.0 High 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0054, the 45th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:05 UTC First seen by agentprime
  2. 31 Oct 2026, 15:05 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.