Vulnerability details
CVE-2026-73247
kestra-io kestra
Kestra: SSRF via Pebble http() function allows unauthenticated access to internal services & cloud metadata
CVSS 3.1
8.6High
Official description
Kestra is an open-source, event-driven orchestration platform. Prior to 2.0.0, Kestra's core/src/main/java/io/kestra/core/runners/pebble/functions/HttpFunction.java passes the user-controlled http() uri argument to URI.create() and the server-side HTTP client without restricting private, loopback, or link-local destinations, allowing an unauthenticated attacker to import and execute a flow that accesses internal services or cloud metadata.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.6High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| kestra-io | kestra | < 2.0.0 | CVEProject cvelistV5 (CNA) |
References and advisories
1- https://github.com/kestra-io/kestra/security/advisories/GHSA-r56g-q4p6-m3p6 x_refsource_CONFIRM
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Details
- Published
- 2026-08-12
- Last updated
- 2026-08-13
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.4%
Probability of exploitation in 30 days
35.1%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- Yes
- Exploitation
- Proof of concept
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-918Server-Side Request Forgery (SSRF)