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Vulnerability record · CVE-2026-29048 · published 6 March 2026

CVE-2026-29048: Humhub cross-site scripting vulnerability

Humhub · Humhub

HumHub is an Open Source Enterprise Social Network. In version 1.18.0, a cross-site scripting vulnerability was identified in the Button component of version 1.18.0. Due to inconsistent output encoding at several points within the software, malicious scripts could be injected and executed in the context of the user's browser. This issue has been patched in version 1.18.1.

6.9 CVSS 4.0 Medium EPSS 0.33% · top 76.4% CWE-79 · Cross-site scripting
6.9CVSS 4.0 base score
0.33%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

HumHub is an Open Source Enterprise Social Network. In version 1.18.0, a cross-site scripting vulnerability was identified in the Button component of version 1.18.0. Due to inconsistent output encoding at several points within the software, malicious scripts could be injected and executed in the context of the user's browser. This issue has been patched in version 1.18.1.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/humhub/humhub/commit/bd06ab4c75f6c65295ee3e1ce3643437e8f9d10a Patch
https://github.com/humhub/humhub/pull/8039 Issue TrackingPatch
https://github.com/humhub/humhub/releases/tag/v1.18.1 ProductRelease Notes
https://github.com/humhub/humhub/security/advisories/GHSA-qxjh-478x-23gm Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-29048), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.