MediumFix available
dovecot — security advisory
Dovecot before 2.3.15 allows ../ Path Traversal. An attacker with access to the local filesystem can trick OAuth2 authentication into using an HS256 validation key from an attacker-controlled location. This occurs during use of local JWT validation with the posix fs driver.
- Products
- dovecot
- Affected versions
- Not specified
- Fixed versions
- 2.3.15-r0
- CVEs
- CVE-2021-29157
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 22:04 UTC · Revision 1
Source evidence
Dovecot before 2.3.15 allows ../ Path Traversal. An attacker with access to the local filesystem can trick OAuth2 authentication into using an HS256 validation key from an attacker-controlled location. This occurs during use of local JWT validation with the posix fs driver.
osv:ALPINE-CVE-2021-29157
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
dovecot
Fixed versions: 2.3.15-r0
Complete source record
{
"id": "87fa7c61fa79abd58a2a87b0b68e76a502b99b1ec2933605b09cdd4d593cc14b",
"url": "https://osv.dev/vulnerability/ALPINE-CVE-2021-29157",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "ALPINE-CVE-2021-29157",
"summary": "Dovecot before 2.3.15 allows ../ Path Traversal. An attacker with access to the local filesystem can trick OAuth2 authentication into using an HS256 validation key from an attacker-controlled location. This occurs during use of local JWT validation with the posix fs driver.",
"evidence": "osv:ALPINE-CVE-2021-29157",
"products": [
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{
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"severity": "medium",
"structured": {
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"aliases": [
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],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"
}
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"affected": [
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],
"package": {
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"ecosystem": "Alpine:v3.11"
},
"database_specific": {
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},
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{
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],
"package": {
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},
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}
],
"package": {
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"ecosystem": "Alpine:v3.13"
},
"database_specific": {
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},
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{
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],
"package": {
"name": "dovecot",
"purl": "pkg:apk/alpine/dovecot?arch=source",
"ecosystem": "Alpine:v3.15"
},
"database_specific": {
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},
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"package": {
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},
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},
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],
"package": {
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"package": {
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},
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},
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{
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],
"package": {
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"ecosystem": "Alpine:v3.23"
},
"database_specific": {
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},
"ecosystem_specific": {}
},
{
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},
{
"fixed": "2.3.15-r0"
}
]
}
],
"package": {
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"purl": "pkg:apk/alpine/dovecot?arch=source",
"ecosystem": "Alpine:v3.24"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2021-29157.json"
},
"ecosystem_specific": {}
}
],
"modified": "2026-10-23T17:17:56.180479936Z",
"provider": "osv",
"upstream": [
"CVE-2021-29157"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2021-29157"
]
},
"related_cves": [
{
"value": "CVE-2021-29157",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 415410,
"published_at": "2021-06-28T12:15:08.647+00:00"
}