absinthe-graphql absinthe_plug up to 1.2.0 graphiql.ex cross site scripting

HistoryDiffrelatejsonxmlCTI

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.1	$0-$5k	0.00

Summaryinfo

A vulnerability classified as problematic has been found in absinthe-graphql absinthe_plug up to 1.2.0. Affected by this issue is the function absinthe_plug in the library lib/absinthe/plug/graphiql.ex. Performing a manipulation results in cross site scripting. This vulnerability is cataloged as CVE-2026-42794. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in absinthe-graphql absinthe_plug up to 1.2.0. It has been classified as problematic. This affects the function absinthe_plug in the library lib/absinthe/plug/graphiql.ex. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. The summary by CVE is:

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.

The weakness was shared by 40826d and Bryan A. Enders as 275. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-42794 since 04/29/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Applying the patch 23a0d5658d32420086711adf4ce8f05febb09963 is able to eliminate this problem. The bugfix is ready for download at github.com.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

absinthe-graphql

Name

absinthe_plug

Version

License

open-source

Website

Product: https://github.com/absinthe-graphql/absinthe_plug/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 23a0d5658d32420086711adf4ce8f05febb09963

Timelineinfo

04/29/2026 CVE reserved
05/08/2026 +9 days Advisory disclosed
05/08/2026 +0 days VulDB entry created
05/22/2026 +14 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 275
Researcher: 40826d, Bryan A. Enders
Status: Confirmed

CVE: CVE-2026-42794 (🔒)
GCVE (CVE): GCVE-0-2026-42794
GCVE (VulDB): GCVE-100-362319

Entryinfo

Created: 05/08/2026 18:52
Updated: 05/22/2026 08:14
Changes: 05/08/2026 18:52 (71), 05/18/2026 10:29 (1), 05/22/2026 08:14 (11)
Complete: 🔍
Cache ID: 216::103