CVE-2026-55424

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Source
https://cve.org/CVERecord?id=CVE-2026-55424
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55424.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55424
Aliases
Published
2026-07-09T22:01:22.249Z
Modified
2026-07-15T16:27:36.197517132Z
Severity
  • 7.4 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Discourse: Topic featured link susceptible to stored XSS
Details

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, a topic "featured link" was not sufficiently normalized and escaped before being rendered in the topic list, allowing a user who can set a featured link to inject JavaScript when default Content Security Policy protections were modified or disabled. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55424.json"
}
References

Affected packages

Git / github.com/discourse/discourse

Affected ranges

Type
GIT
Repo
https://github.com/discourse/discourse
Events
Introduced
322d3c0ac6a8f133b3f82875e9dbbe310f638c1b
Introduced
fdd750d960e603415db62242eca3c30d68e366db
Introduced
640840d818f4ee9375829ece0ef452923bb0c012
Fixed
c06899647d758493d95a5b301e573ffa3db1e878
Fixed
4bbdddfc6700ca23604242111d4fa0e00347af97
Fixed
598586ccf2e046a25d4b54132e4e1feb47f24e98
Fixed
1bce8881e4253d9bbab56f011a12ef899b926b59
Fixed
6679d9a5083488bae10c2adbb345c481c583242c
Fixed
6828aee9b15c2655d63b515ac919830bd540ff83
Fixed
c9b9405f5bd0bf0269e505e28e3aad388d7657c5
Fixed
06d03da34c4ed09ea59f917f045ba250d2b6320d
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "2026.1.0-latest"
        },
        {
            "fixed": "2026.1.5"
        },
        {
            "introduced": "2026.4.0-latest"
        },
        {
            "fixed": "2026.4.2"
        },
        {
            "introduced": "2026.5.0-latest"
        },
        {
            "fixed": "2026.5.1"
        }
    ]
}

Affected versions

Other
esr
stable
v2026.*
v2026.1.0
v2026.1.0-latest
v2026.1.1
v2026.1.2
v2026.1.3
v2026.1.4
v2026.4.0
v2026.4.0-latest
v2026.4.1
v2026.5.0
v2026.5.0-latest
v2026.5.0-latest.1
v2026.6.0-latest

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55424.json"