High
Kirby: Self cross-site scripting (self-XSS) in the writer field
Type: advisorySources: OSV
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites using the writer field in any blueprint allowed a scripting link to be included as the target of a link or email link in writer mark components, making the target clickable by the user who entered it and enabling self cross-site scripting in the Panel. This issue is fixed in versions 4.9.4 and 5.4.4.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-49276
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 8 Nov 2026, 00:30 UTC · Revision 1
Source evidence
Kirby: Self cross-site scripting (self-XSS) in the writer field
core-osv · Original sourcePublished 9 Jul 2026, 18:48 UTC
Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites using the writer field in any blueprint allowed a scripting link to be included as the target of a link or email link in writer mark components, making the target clickable by the user who entered it and enabling self cross-site scripting in the Panel. This issue is fixed in versions 4.9.4 and 5.4.4.
osv:CVE-2026-49276
Complete source record
{
"id": "694d1bbbf7ec0803dd14ca737772d135c0759f5500f5fd0d0ec71b76e656f5e9",
"url": "https://osv.dev/vulnerability/CVE-2026-49276",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Kirby: Self cross-site scripting (self-XSS) in the writer field",
"summary": "Kirby is an open-source content management system. Prior to 4.9.4 and 5.4.4, Kirby sites using the writer field in any blueprint allowed a scripting link to be included as the target of a link or email link in writer mark components, making the target clickable by the user who entered it and enabling self cross-site scripting in the Panel. This issue is fixed in versions 4.9.4 and 5.4.4.",
"evidence": "osv:CVE-2026-49276",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-49276",
"aliases": [
"CVE-2026-49276",
"GHSA-rhj6-r49h-5932"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/getkirby/kirby",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "274dca6df93de6eda649f27f5367ddbc8e0f1fe1"
},
{
"introduced": "2ff182ba39ddea19fa1615bd3733f734b5e53842"
},
{
"fixed": "3f96d3b9ccda22f0d2f901b96376b5d08556ad75"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "4.9.4"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "5.0.0"
},
{
"fixed": "5.4.4"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "274dca6df93de6eda649f27f5367ddbc8e0f1fe1"
}
],
"source": "REFERENCES_TAG",
"original_tag": "4.9.4"
},
{
"range": [
{
"fixed": "3f96d3b9ccda22f0d2f901b96376b5d08556ad75"
}
],
"source": "REFERENCES_TAG",
"original_tag": "5.4.4"
}
]
}
}
],
"versions": [
"5.4.3",
"5.4.2",
"4.9.2",
"5.4.1",
"4.9.1",
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"5.2.0",
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"4.1.0",
"3.9.8",
"4.0.3",
"4.0.2",
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"3.9.6.1",
"3.9.6",
"3.8.4",
"3.9.6-rc.1",
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"3.9.3",
"3.9.2",
"3.9.1",
"3.9.0",
"3.8.3",
"3.8.2",
"3.8.1.1",
"3.8.1",
"3.8.0",
"3.7.5",
"3.7.4",
"3.7.3",
"3.6.6",
"3.7.4-rc.1",
"3.5.7.1",
"3.7.2.1",
"3.7.2",
"3.7.1",
"3.7.0.2",
"3.7.0.1",
"3.7.0",
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"3.5.0-rc.6",
"3.5.0-rc.5",
"3.5.0-rc.4",
"3.5.0-rc.3",
"3.5.0-rc.2",
"3.5.0-rc.1",
"3.4.2",
"3.4.1",
"3.4.0",
"3.3.6",
"3.3.5",
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"3.3.2",
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"3.2.5-rc.1",
"3.2.3-rc.1",
"3.2.2",
"3.2.1",
"3.2.1-rc.1",
"3.2.0",
"3.2.0-rc.4",
"3.2.0-rc.3",
"3.2.0-rc.2",
"3.2.0-rc.1",
"3.1.4",
"3.1.4-rc.1",
"3.1.3",
"3.1.3-rc.1",
"3.1.2",
"3.1.2-rc.1",
"3.1.1",
"3.1.0",
"3.1.0-rc.1",
"3.0.3",
"3.0.3-rc.3",
"3.0.3-rc.2",
"3.0.3-rc.1",
"3.0.2",
"3.0.2-rc.1",
"3.0.1",
"3.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49276.json"
}
}
],
"modified": "2026-10-28T02:30:52.156179017Z",
"provider": "osv",
"references": [
"https://github.com/getkirby/kirby/releases/tag/4.9.4",
"https://github.com/getkirby/kirby/releases/tag/5.4.4",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49276.json",
"https://github.com/getkirby/kirby/security/advisories/GHSA-rhj6-r49h-5932",
"https://nvd.nist.gov/vuln/detail/CVE-2026-49276"
],
"provider_metadata": {
"cwe_ids": [
"CWE-83"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49276.json"
}
},
"related_cves": [
{
"value": "CVE-2026-49276",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 520982,
"published_at": "2026-07-09T18:48:50.543+00:00"
}