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TI-2026-35567 Aliases CVE-2026-48129

Kestra task inputFiles accepts traversal filenames for worker file writes

Priority MEDIUM 62CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · High · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Kestra is an open-source, event-driven orchestration platform. Prior to versions 1.3.19, 1.2.19, 1.1.19, and 1.0.43, Kestra task `inputFiles` writes rendered file names directly under the task working directory. When a flow forwards untrusted execution or webhook data into an `inputFiles` file name, a caller can use `../` path segments to create or overwrite files outside that task working directory on the worker filesystem. Versions 1.3.19, 1.2.19, 1.1.19, and 1.0.43 patch the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00363 30th percentileScored 2026-11-07
Fix Fixed kestra (kestra-io): 1.0.43, 1.1.19, 1.2.19 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Kestrakestrabefore 1.0.43; 1.1.0 to before 1.1.19; 1.2.0 to before 1.2.19; 1.3.0 to before 1.3.191.0.43, 1.1.19, 1.2.19, 1.3.19Patch availableCNA
  • kestra VendorKestra Affected before 1.0.43; 1.1.0 to before 1.1.19; 1.2.0 to before 1.2.19; 1.3.0 to before 1.3.19 Fixed in 1.0.43, 1.1.19, 1.2.19, 1.3.19 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:kestra:kestra:*:*:*:*:*:*:*:*——Kestra
  • cpe:2.3:a:kestra:kestra:*:*:*:*:*:*:*:* Versions — — ·Kestra

Remediation

  • Fix · CNA kestra (kestra-io) Fixed in 1.0.43, 1.1.19, 1.2.19, 1.3.19

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-48129

References

Other 1

  • TI-2026-36769 Kestra: Unauthenticated Remote Code Execution via Authentication Bypass in `AuthenticationFilter` KEVCVSS 3.1CRITICAL 10.0
  • TI-2026-38637 Kestra: Unauthenticated RCE via /configs path-suffix auth-filter bypass CVSS 3.1CRITICAL 10.0
  • TI-2026-28138 Kestra v1.3.3 and before is vulnerable to SQL Injection. CVSS 3.1CRITICAL 9.8
  • TI-2026-51384 Kestra: SSRF via Pebble http() function allows unauthenticated access to internal services & cloud metadata CVSS 3.1HIGH 8.6
  • TI-2026-26858 Kestra: Remote Code Execution via SQL Injection CVSS 3.1CRITICAL 10.0
  • TI-2026-39775 Kestra BasicAuth Password Stored as SHA-512 Enables Offline Brute-Force Attack CVSS 3.1HIGH 8.7
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences