High
Gotenberg: Chromium deny-list bypass via case-insensitive URL scheme
Type: advisorySources: OSV
Gotenberg is an API for converting document formats. Prior to version 8.29.0, the fix introduced for CVE-2024-21527 can be bypassed using mixed-case or uppercase URL schemes. This issue has been patched in version 8.29.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-27018
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 16:34 UTC · Revision 1
Source evidence
Gotenberg: Chromium deny-list bypass via case-insensitive URL scheme
core-osv · Original sourcePublished 30 Mar 2026, 20:14 UTC
Gotenberg is an API for converting document formats. Prior to version 8.29.0, the fix introduced for CVE-2024-21527 can be bypassed using mixed-case or uppercase URL schemes. This issue has been patched in version 8.29.0.
osv:CVE-2026-27018
Complete source record
{
"id": "fa339b8fcf88c790e2c9d9928ed2f7198fa4f51ac58296dd53353bb15285e7d2",
"url": "https://osv.dev/vulnerability/CVE-2026-27018",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Gotenberg: Chromium deny-list bypass via case-insensitive URL scheme",
"summary": "Gotenberg is an API for converting document formats. Prior to version 8.29.0, the fix introduced for CVE-2024-21527 can be bypassed using mixed-case or uppercase URL schemes. This issue has been patched in version 8.29.0.",
"evidence": "osv:CVE-2026-27018",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-27018",
"aliases": [
"CVE-2026-27018",
"GHSA-jjwv-57xh-xr6r",
"GO-2026-4905"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:P"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/gotenberg/gotenberg",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "5be574081c79cacd5c05c91d0fa5fd5c7b4a9ea4"
},
{
"fixed": "06b2b2e10c52b58135edbfe82e94d599eb0c5a11"
},
{
"fixed": "8625a4e899eb75e6fcf46d28394334c7fd79fff5"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:thecodingmachine:gotenberg:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "8.29.0"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "06b2b2e10c52b58135edbfe82e94d599eb0c5a11"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "8625a4e899eb75e6fcf46d28394334c7fd79fff5"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "5be574081c79cacd5c05c91d0fa5fd5c7b4a9ea4"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v8.29.0"
}
]
}
}
],
"versions": [
"v8.28.0",
"v8.27.0",
"v8.26.0",
"v8.25.1",
"v8.25.0",
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"v8.15.1",
"v8.15.0",
"v8.14.1",
"v8.14.0",
"v8.13.0",
"v8.12.0",
"v8.11.1",
"v8.11.0",
"v8.10.0",
"v8.9.2",
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"v8.9.0",
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"v8.8.0",
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"v8.0.1",
"v8.0.0",
"v7.10.1",
"v7.10.0",
"v7.9.2",
"v7.9.1",
"v7.9.0",
"v7.8.3",
"v7.8.2",
"v7.8.1",
"v7.8.0",
"v7.7.2",
"v7.7.1",
"v7.7.0",
"v7.6.2",
"v7.6.1",
"v7.6.0",
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"v7.5.0",
"v7.4.3",
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"v7.4.1",
"v7.4.0",
"v7.3.1",
"v7.3.0",
"v7.2.0",
"v7.1.1",
"v7.1.0",
"v7.0.7",
"v7.0.6",
"v7.0.5",
"v7.0.4",
"v7.0.3",
"v7.0.2",
"v7.0.1",
"v7.0.0",
"6.4.4",
"6.4.3",
"6.4.2",
"6.4.1",
"6.4.0",
"6.3.1",
"6.3.0",
"6.2.1",
"6.2.0",
"6.1.2",
"6.1.1",
"6.1.0",
"6.0.4",
"6.0.3",
"6.0.2",
"6.0.1",
"6.0.0",
"5.1.0",
"5.0.2",
"5.0.1",
"5.0.0",
"4.4.0",
"4.3.0",
"4.2.0",
"4.1.0",
"4.0.0",
"3.2.0",
"3.1.2",
"3.1.1",
"3.1.0",
"3.0.2",
"3.0.1",
"3.0.0",
"2.0.0",
"1.0.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27018.json"
}
}
],
"modified": "2026-10-28T02:30:37.592590888Z",
"provider": "osv",
"references": [
"https://github.com/gotenberg/gotenberg/releases/tag/v8.29.0",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27018.json",
"https://github.com/gotenberg/gotenberg/security/advisories/GHSA-jjwv-57xh-xr6r",
"https://nvd.nist.gov/vuln/detail/CVE-2026-27018",
"https://github.com/gotenberg/gotenberg/commit/06b2b2e10c52b58135edbfe82e94d599eb0c5a11",
"https://github.com/gotenberg/gotenberg/commit/8625a4e899eb75e6fcf46d28394334c7fd79fff5"
],
"provider_metadata": {
"cwe_ids": [
"CWE-22",
"CWE-918"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27018.json"
}
},
"related_cves": [
{
"value": "CVE-2026-27018",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 504624,
"published_at": "2026-03-30T20:14:32.86+00:00"
}