CVE-2026-123094: XSS (CVSS 5.4)

Description

Huginn before 2026.11.05 contains a stored cross-site scripting vulnerability in the service_label helper that marks unescaped OAuth service display names as html_safe. Authenticated attackers can connect an OAuth account with a crafted nickname, name or email and share it globally, executing JavaScript when victims attach it to Agents and view them, exposing Credentials, Agents and Events, and admin actions if the victim is an administrator.

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CVSS v3.1 Score

5.4

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS — Exploit Prediction

0.0018

Probability of exploitation

0.07%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

References

Other References

https://github.com/huginn/huginn https://github.com/huginn/huginn/blob/v2026.11.01/app/helpers/application_helper.rb#L78-L88 https://github.com/huginn/huginn/commit/92229a5e7343bfffc740d31e42b9654b212b678b https://github.com/huginn/huginn/releases/tag/v2026.11.05 https://github.com/huginn/huginn/security/advisories/GHSA-rjw9-xx87-f2ww https://hackmd.io/@leediay/SJtUoLFTfx https://www.vulncheck.com/advisories/huginn-before-2026.11.05-stored-xss-via-oauth-service-display-name

Frequently Asked Questions

What is CVE-2026-123094? +

Huginn before 2026.11.05 contains a stored cross-site scripting vulnerability in the service_label helper that marks unescaped OAuth service display names as html_safe. Authenticated attackers can connect an OAuth account with a crafted nickname, name or email and share it globally, executing JavaScript when victims attach it to Agents and view them, exposing Credentials, Agents and Events, and admin actions if the victim is an administrator. It has a CVSS v3.1 base score of 5.4 (MEDIUM).

How severe is CVE-2026-123094? +

CVE-2026-123094 has a CVSS v3.1 score of 5.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0018, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-123094? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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