Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Absinthe-Graphql | Absinthe.Plug | >= 1.2.0, < 1.5.10 |
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-42794.htmlThird Party Advisory
- https://github.com/absinthe-graphql/absinthe_plug/commit/23a0d5658d32420086711adPatch
- https://github.com/absinthe-graphql/absinthe_plug/issues/275Issue Tracking
- https://osv.dev/vulnerability/EEF-CVE-2026-42794Third Party Advisory
- https://github.com/absinthe-graphql/absinthe_plug/issues/275Issue Tracking
FAQ
What is CVE-2026-42794?
CVE-2026-42794 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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.Pl...
How severe is CVE-2026-42794?
CVE-2026-42794 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42794?
Check the references section above for vendor advisories and patch information. Affected products include: Absinthe-Graphql Absinthe.Plug.