High
Semaphore UI through 2.19.12 Missing Authorization on GET and HEAD Requests
Type: advisorySources: OSV
Semaphore UI through 2.19.12 exempts GET and HEAD requests from project resource permission checks in GetMustCanMiddleware. Attackers with guest or task_runner roles can read all project environments including plaintext secrets, credentials, and passwords via GET requests to the environment endpoint.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-91994
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 12:13 UTC · Revision 1
Source evidence
Semaphore UI through 2.19.12 Missing Authorization on GET and HEAD Requests
core-osv · Original sourcePublished 15 Sept 2026, 11:35 UTC
Semaphore UI through 2.19.12 exempts GET and HEAD requests from project resource permission checks in GetMustCanMiddleware. Attackers with guest or task_runner roles can read all project environments including plaintext secrets, credentials, and passwords via GET requests to the environment endpoint.
osv:CVE-2026-91994
Complete source record
{
"id": "8516bd2036459b884541466697e8a2cd287e42a64ca6178df61aed315d5f4c64",
"url": "https://osv.dev/vulnerability/CVE-2026-91994",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Semaphore UI through 2.19.12 Missing Authorization on GET and HEAD Requests",
"summary": "Semaphore UI through 2.19.12 exempts GET and HEAD requests from project resource permission checks in GetMustCanMiddleware. Attackers with guest or task_runner roles can read all project environments including plaintext secrets, credentials, and passwords via GET requests to the environment endpoint.",
"evidence": "osv:CVE-2026-91994",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-91994",
"aliases": [
"CVE-2026-91994"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/semaphoreui/semaphore",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"last_affected": "012ed06d3eccadaed594c73b93b3d8a2459b576f"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"last_affected": "2.19.12"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"introduced": "0"
},
{
"last_affected": "2.19.12"
}
],
"source": "DESCRIPTION"
}
]
}
}
],
"versions": [
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"v2.19.11",
"v2.19.10",
"v2.19.9",
"v2.19.8",
"v2.19.7",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-91994.json"
}
}
],
"modified": "2026-10-28T02:30:28.767779770Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91994.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-91994",
"https://www.vulncheck.com/advisories/semaphore-ui-through-2.19.12-missing-authorization-on-get-and-head-requests",
"https://github.com/semaphoreui/semaphore/issues/4150",
"https://github.com/semaphoreui/semaphore",
"https://github.com/semaphoreui/semaphore/blob/v2.19.12/api/projects/project.go#L89-L106",
"https://github.com/semaphoreui/semaphore/blob/v2.19.12/api/router.go#L308-L329"
],
"provider_metadata": {
"cwe_ids": [
"CWE-862"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/91xxx/CVE-2026-91994.json"
}
},
"related_cves": [
{
"value": "CVE-2026-91994",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 495299,
"published_at": "2026-09-15T11:35:49.385+00:00"
}