CVE Details
CVE-2026-49869
Kestra OSS OS Command Injection Vulnerability
Published: 2026-09-02
CVSS: 10 CRITICAL
Product: Kestra Kestra OSS
Due Date: 2026-09-05
Kestra OSS contains an OS command injection vulnerability that could allow an unauthenticated remote attacker to create and execute arbitrary workflows without credentials.
GitHub PoC
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FIRST EPSS
EPSS estimates the probability of exploitation in the next 30 days. Higher values indicate higher likelihood of real-world exploitation.
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Show Raw Data
| Key | Remaining Key | Value |
|---|---|---|
| dataType | CVE_RECORD | |
| dataVersion | 5.2 | |
| cveMetadata > | cveId | CVE-2026-49869 |
| cveMetadata > | assignerOrgId | a0819718-46f1-4df5-94e2-005712e83aaa |
| cveMetadata > | state | PUBLISHED |
| cveMetadata > | assignerShortName | GitHub_M |
| cveMetadata > | dateReserved | 2026-06-01T22:03:19.641Z |
| cveMetadata > | datePublished | 2026-06-26T20:58:19.576Z |
| cveMetadata > | dateUpdated | 2026-09-02T17:48:53.386Z |
| containers > | cna > title | Kestra: Unauthenticated Remote Code Execution via Authentication Bypass in `AuthenticationFilter` |
| containers > | cna > problemTypes > 0 > descriptions > 0 > cweId | CWE-78 |
| containers > | cna > problemTypes > 0 > descriptions > 0 > lang | en |
| containers > | cna > problemTypes > 0 > descriptions > 0 > description | CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') |
| containers > | cna > problemTypes > 0 > descriptions > 0 > type | CWE |
| containers > | cna > problemTypes > 1 > descriptions > 0 > cweId | CWE-184 |
| containers > | cna > problemTypes > 1 > descriptions > 0 > lang | en |
| containers > | cna > problemTypes > 1 > descriptions > 0 > description | CWE-184: Incomplete List of Disallowed Inputs |
| containers > | cna > problemTypes > 1 > descriptions > 0 > type | CWE |
| containers > | cna > problemTypes > 2 > descriptions > 0 > cweId | CWE-287 |
| containers > | cna > problemTypes > 2 > descriptions > 0 > lang | en |
| containers > | cna > problemTypes > 2 > descriptions > 0 > description | CWE-287: Improper Authentication |
| containers > | cna > problemTypes > 2 > descriptions > 0 > type | CWE |
| containers > | cna > problemTypes > 3 > descriptions > 0 > cweId | CWE-918 |
| containers > | cna > problemTypes > 3 > descriptions > 0 > lang | en |
| containers > | cna > problemTypes > 3 > descriptions > 0 > description | CWE-918: Server-Side Request Forgery (SSRF) |
| containers > | cna > problemTypes > 3 > descriptions > 0 > type | CWE |
| containers > | cna > metrics > 0 > cvssV3_1 > attackComplexity | LOW |
| containers > | cna > metrics > 0 > cvssV3_1 > attackVector | NETWORK |
| containers > | cna > metrics > 0 > cvssV3_1 > availabilityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > baseScore | 10 |
| containers > | cna > metrics > 0 > cvssV3_1 > baseSeverity | CRITICAL |
| containers > | cna > metrics > 0 > cvssV3_1 > confidentialityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > integrityImpact | HIGH |
| containers > | cna > metrics > 0 > cvssV3_1 > privilegesRequired | NONE |
| containers > | cna > metrics > 0 > cvssV3_1 > scope | CHANGED |
| containers > | cna > metrics > 0 > cvssV3_1 > userInteraction | NONE |
| containers > | cna > metrics > 0 > cvssV3_1 > vectorString | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| containers > | cna > metrics > 0 > cvssV3_1 > version | 3.1 |
| containers > | cna > references > 0 > name | https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx |
| containers > | cna > references > 0 > tags > 0 | x_refsource_CONFIRM |
| containers > | cna > references > 0 > url | https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx |
| containers > | cna > affected > 0 > vendor | kestra-io |
| containers > | cna > affected > 0 > product | kestra |
| containers > | cna > affected > 0 > versions > 0 > version | < 1.0.45 |
| containers > | cna > affected > 0 > versions > 0 > status | affected |
| containers > | cna > affected > 0 > versions > 1 > version | >= 1.1.0, < 1.3.21 |
| containers > | cna > affected > 0 > versions > 1 > status | affected |
| containers > | cna > providerMetadata > orgId | a0819718-46f1-4df5-94e2-005712e83aaa |
| containers > | cna > providerMetadata > shortName | GitHub_M |
| containers > | cna > providerMetadata > dateUpdated | 2026-06-26T20:58:19.576Z |
| containers > | cna > descriptions > 0 > lang | en |
| containers > | cna > descriptions > 0 > value | Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, AuthenticationFilter in Kestra OSS uses request.getPath().endsWith("/configs") to whitelist the public configuration endpoint from Basic Auth. Because the check is a suffix match rather than an exact path match, any API path whose last segment is configs bypasses authentication entirely. An unauthenticated remote attacker can exploit this to create and execute arbitrary workflows without credentials. Because Kestra ships with script execution plugins (plugin-script-shell, plugin-script-python, etc.) enabled by default, this directly results in unauthenticated Remote Code Execution as root inside the Kestra worker container. This vulnerability is fixed in 1.0.45 and 1.3.21. |
| containers > | cna > source > advisory | GHSA-5vc5-wxxq-3fjx |
| containers > | cna > source > discovery | UNKNOWN |
| containers > | adp > 0 > metrics > 0 > other > type | ssvc |
| containers > | adp > 0 > metrics > 0 > other > content > id | CVE-2026-49869 |
| containers > | adp > 0 > metrics > 0 > other > content > role | CISA Coordinator |
| containers > | adp > 0 > metrics > 0 > other > content > options > 0 > Exploitation | active |
| containers > | adp > 0 > metrics > 0 > other > content > options > 1 > Automatable | yes |
| containers > | adp > 0 > metrics > 0 > other > content > options > 2 > Technical Impact | total |
| containers > | adp > 0 > metrics > 0 > other > content > version | 2.0.3 |
| containers > | adp > 0 > metrics > 0 > other > content > timestamp | 2026-09-02T17:44:16.457290Z |
| containers > | adp > 0 > references > 0 > url | https://github.com/kestra-io/kestra/security/advisories/GHSA-5vc5-wxxq-3fjx |
| containers > | adp > 0 > references > 0 > tags > 0 | exploit |
| containers > | adp > 0 > references > 1 > url | https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-49869 |
| containers > | adp > 0 > references > 1 > tags > 0 | government-resource |
| containers > | adp > 0 > title | CISA ADP Vulnrichment |
| containers > | adp > 0 > providerMetadata > orgId | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
| containers > | adp > 0 > providerMetadata > shortName | CISA-ADP |
| containers > | adp > 0 > providerMetadata > dateUpdated | 2026-09-02T17:48:53.386Z |