Skip to main content
← All vulnerabilities
CVE-2026-42794

Reflected XSS via backslash bypass in GraphiQL js_escape in absinthe_plug

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 1.5.10
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: partial

Summary

Improper Neutralization of Input During Web Page Generation (XSS) vulnerability in absinthe-graphql absinthe_plug allows reflected cross-site scripting via the GraphiQL interface. 'Elixir.Absinthe.Plug.GraphiQL':js_escape/1 in lib/absinthe/plug/graphiql.ex escapes single quotes and newlines in the query GET parameter before embedding it in an inline JavaScript string, but does not escape backslashes. An attacker can bypass the escaping by prefixing a quote with a backslash (e.g. \'), breaking out of the string context and executing arbitrary JavaScript in the victim's browser. This issue affects absinthe_plug: from 1.2.0 before 1.5.10.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • absinthe_plug

    From 1.2.0 · fixed in 1.5.10

  • absinthe-graphql/absinthe_plug

    Version range not reported

References 4

GitHub · absinthe-graphql/absinthe_plug

cna.erlef.org

osv.dev