ExploitedIn CISA KEVFix available

CVE-2026-49869

Q: Is CVE-2026-49869 actively exploited?

Yes. CVE-2026-49869 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-09-05.

Q: What is the CVSS score for CVE-2026-49869?

CVE-2026-49869 has a CVSS v3 base score of 10 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

Exploitation confirmed. First attested on 2026-09-02 by CISA-ADP, CISA KEV, GCVE · previdian.

Published2026-06-26
Fixed in1.3.21 · 1.0.45
WeaknessCWE-184 · CWE-287 · CWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2026-06-2622:16CVE publishedNVD
2026-09-02Added to the CISA KEV catalogCISA KEV
2026-09-02Listed as exploited by GCVEGCVE
2026-09-02Exploitation first reportedCISA KEV
2026-09-0217:44SSVC exploitation set to activeCISA-ADP
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-49869?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-49869?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Kestra

Branch	Affected	Fixed in	Source
1.x	≥ 1.1.0, < 1.3.21	1.3.21	NVD
1.0	< 1.0.45	1.0.45	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Kestra to 1.3.21 · 1.0.45
CISA’s 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.due 2026-09-05

Advisories and patches

github.comVendor Advisory

Detection

read 2026-10-23 19:25 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 2 repositories, unverifiedAp0dexMe0/CVE-2026-49869EQSTLab/CVE-2026-49869

CISA Known Exploited Vulnerability

Date Added: 2026-09-02
Patch Due Date: 2026-09-05
Ransomware Use: Unknown
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.

Sources

NVDCVE recordread 2026-10-23
CISA KEVKEV entry2026-09-02
GCVEexploitation2026-09-02
CISA-ADPSSVC decisionactive2026-09-02
OpenCVESSVC decisionactive—
CNACVSS 3.110read 2026-10-23
CNAweakness (CWE)CWE-184, CWE-287, CWE-78, CWE-918read 2026-10-23
FIRST EPSSEPSS score2.1 %2026-10-22
PoC-in-GitHubproof of concept2read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published: 2026-06-26
Last Modified: 2026-09-03
NVD status: Analyzed

Frequently asked questions

What is CVE-2026-49869?

Is CVE-2026-49869 actively exploited?

Yes. CVE-2026-49869 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-09-05.

What is the CVSS score for CVE-2026-49869?

CVE-2026-49869 has a CVSS v3 base score of 10 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

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