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CVE Vulnerability Details :
CVE-2026-42794
PUBLISHED
More InfoOfficial Page
Assigner-EEF
Assigner Org ID-6b3ad84c-e1a6-4bf7-a703-f496b71e49db
View Known Exploited Vulnerability (KEV) details
Published At-08 May, 2026 | 15:42
Updated At-09 May, 2026 | 04:18
Rejected At-
▼CVE Numbering Authority (CNA)
Reflected XSS via backslash bypass in GraphiQL js_escape in absinthe_plug

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.

Affected Products
Vendor
absinthe-graphql
Product
absinthe_plug
Collection URL
https://repo.hex.pm
Package Name
absinthe_plug
Repo
https://github.com/absinthe-graphql/absinthe_plug
CPEs
  • cpe:2.3:a:absinthe-graphql:absinthe_plug:*:*:*:*:*:*:*:*
Modules
  • 'Elixir.Absinthe.Plug.GraphiQL'
Program Files
  • lib/absinthe/plug/graphiql.ex
Program Routines
  • 'Elixir.Absinthe.Plug.GraphiQL':js_escape/1
Default Status
unaffected
Versions
Affected
  • From 1.2.0 before * (semver)
Vendor
absinthe-graphql
Product
absinthe_plug
Collection URL
https://github.com
Package Name
absinthe-graphql/absinthe_plug
Repo
https://github.com/absinthe-graphql/absinthe_plug
CPEs
  • cpe:2.3:a:absinthe-graphql:absinthe_plug:*:*:*:*:*:*:*:*
Modules
  • 'Elixir.Absinthe.Plug.GraphiQL'
Program Files
  • lib/absinthe/plug/graphiql.ex
Program Routines
  • 'Elixir.Absinthe.Plug.GraphiQL':js_escape/1
Default Status
unaffected
Versions
Affected
  • From 26241817cb4b9be4de3f5972c5fba3d36de3d713 before 23a0d5658d32420086711adf4ce8f05febb09963 (git)
Problem Types
TypeCWE IDDescription
CWECWE-79CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Type: CWE
CWE ID: CWE-79
Description: CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Metrics
VersionBase scoreBase severityVector
4.02.3LOW
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Version: 4.0
Base score: 2.3
Base severity: LOW
Vector:
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
CAPEC-86CAPEC-86 XSS Using HTTP Query Strings
CAPEC ID: CAPEC-86
Description: CAPEC-86 XSS Using HTTP Query Strings
Solutions
Configurations

The application must mount Absinthe.Plug.GraphiQL on a route that is reachable by untrusted users. The GraphiQL interface is a developer tool and is typically disabled or restricted in production deployments.

Workarounds
Exploits
Credits
finder
40826d
finder
Bryan A. Enders
remediation developer
Leandro Moreno
remediation reviewer
Ben Wilson
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/absinthe-graphql/absinthe_plug/issues/275
vendor-advisory
https://cna.erlef.org/cves/CVE-2026-42794.html
related
https://osv.dev/vulnerability/EEF-CVE-2026-42794
related
https://github.com/absinthe-graphql/absinthe_plug/commit/23a0d5658d32420086711adf4ce8f05febb09963
patch
Hyperlink: https://github.com/absinthe-graphql/absinthe_plug/issues/275
Resource:
vendor-advisory
Hyperlink: https://cna.erlef.org/cves/CVE-2026-42794.html
Resource:
related
Hyperlink: https://osv.dev/vulnerability/EEF-CVE-2026-42794
Resource:
related
Hyperlink: https://github.com/absinthe-graphql/absinthe_plug/commit/23a0d5658d32420086711adf4ce8f05febb09963
Resource:
patch
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/absinthe-graphql/absinthe_plug/issues/275
exploit
Hyperlink: https://github.com/absinthe-graphql/absinthe_plug/issues/275
Resource:
exploit
Details not found