Skip to content
brandefense.io
Request A Demo
Vulnerability Intelligence

CVE-2026-49869

CriticalExploitedPublic exploit

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.

Published Jun 26, 2026 · Updated Sep 4, 2026 · Also known as EUVD-2026-39922, GHSA-5vc5-wxxq-3fjx

Key Facts

Patch immediately
  • CVE-2026-49869 is a critical-severity vulnerability (CVSS 10.0 v3.1) affecting Kestra.
  • It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Aug 26, 2026. Public exploit code is available.
  • EPSS estimates a 2.1% probability of exploitation in the next 30 days.
  • Fixed versions are available, including Kestra 1.0.45, Kestra 1.3.21.
  • Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

10.0

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

2.1%

Higher than 81.3% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2026-49869 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

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.

Known-Exploited Catalog Listings

CatalogAddedRemediation dueRansomware use
CISA KEVSep 2, 2026Sep 5, 2026Not reported
Industry KEV feedAug 26, 2026Sep 5, 2026Not reported
CIRCL KEVSep 2, 2026Sep 5, 2026Not reported
ENISA EUVDSep 2, 2026n/aNot reported

Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Affected Products

2 affected entries in total
ProductAffected versionsFixed in
KestraKestraSee advisory1.0.45

Patched Releases

Kestra

1.0.45, 1.3.21

Timeline

  1. Publicly disclosed

    Jun 26, 2026

  2. Added to Industry KEV feed

    Aug 26, 2026

  3. Added to CISA KEV

    Sep 2, 2026

  4. Added to CIRCL KEV

    Sep 2, 2026

  5. Added to ENISA EUVD

    Sep 2, 2026

  6. Last updated

    Sep 4, 2026

Weakness Type

  • CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
  • CWE-184 Incomplete List of Disallowed Inputs
  • CWE-287 Improper Authentication
  • CWE-918 Server-Side Request Forgery (SSRF)

References

2 more references in the full CVE brief

FAQ

Common Questions.

Is CVE-2026-49869 Running On Your Attack Surface?

Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.

Request A Demo