FKIE_CVE-2026-45807
Vulnerability from fkie_nvd - Published: 2026-06-26 22:16 - Updated: 2026-07-01 12:42
Severity
Summary
Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.43 and 1.3.19, several Kestra API endpoints accept a kestra:// URI from the client and pass it through StorageInterface.parentTraversalGuard before reading the underlying file from the local storage backend. The guard only inspects the literal URI.toString(), so a URL-encoded .. written as %2E%2E slips through. The downstream code then calls URI.getPath(), which decodes %2E%2E back to .., and the resulting path is handed to Paths.get(...) without normalization. The OS resolves the .. segments at open(2) time, so an authenticated user with a single execution can read any file the Kestra process has access to on the host filesystem (/etc/passwd, mounted secrets, other tenants' execution outputs, etc.). This vulnerability is fixed in 1.0.43 and 1.3.19.
References
| URL | Tags | ||
|---|---|---|---|
| security-advisories@github.com | https://github.com/kestra-io/kestra/security/advisories/GHSA-3529-p4wf-xp79 | Exploit, Mitigation, Vendor Advisory | |
| 134c704f-9b21-4f2e-91b3-4a467353bcc0 | https://github.com/kestra-io/kestra/security/advisories/GHSA-3529-p4wf-xp79 | Exploit, Mitigation, Vendor Advisory |
{
"affected": [
{
"affectedData": [
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"product": "kestra",
"vendor": "kestra-io",
"versions": [
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"status": "affected",
"version": "\u003c 1.0.43"
},
{
"status": "affected",
"version": "\u003e= 1.1.0, \u003c 1.3.19"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"configurations": [
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.43 and 1.3.19, several Kestra API endpoints accept a kestra:// URI from the client and pass it through StorageInterface.parentTraversalGuard before reading the underlying file from the local storage backend. The guard only inspects the literal URI.toString(), so a URL-encoded .. written as %2E%2E slips through. The downstream code then calls URI.getPath(), which decodes %2E%2E back to .., and the resulting path is handed to Paths.get(...) without normalization. The OS resolves the .. segments at open(2) time, so an authenticated user with a single execution can read any file the Kestra process has access to on the host filesystem (/etc/passwd, mounted secrets, other tenants\u0027 execution outputs, etc.). This vulnerability is fixed in 1.0.43 and 1.3.19."
}
],
"id": "CVE-2026-45807",
"lastModified": "2026-07-01T12:42:40.193",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.7,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
"version": "3.1"
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"role": "CISA Coordinator",
"timestamp": "2026-06-29T12:13:25.005390Z",
"version": "2.0.3"
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"published": "2026-06-26T22:16:31.973",
"references": [
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"tags": [
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"type": "Secondary"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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