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CVE-2026-49869

CRITICAL 10 KNOWN EXPLOITED PoC CATALOGUED ALL-YEARS

Published 2026-06-26 · Last modified 2026-09-03 · GitHub_M · NVD: Analyzed

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.

ACTIVELY EXPLOITED

Confirmed exploited in the wild — in CISA KEV since 2026-09-02. Patch or mitigate now.

Exploitation likelihood

2.1%chance of exploitation in 30 days · 82nd percentile

● In CISA KEV (2026-09-02)● Catalogued PoC◆ SSVC: exploitation active, automatable yes

Impact if exploited

10CVSS 3.1 · CRITICAL · CNA

  • ConfidentialityHigh
  • IntegrityHigh
  • AvailabilityHigh

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ✓Privileges: No account or privileges required
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

Public PoC or exploit resources are catalogued below.

Listed by the named source; Vulnpedia has not tested these resources.

PoC data: JSON

Resource commands

curl -s https://vulnpedia.com/cve/CVE-2026-49869/poc.jsonMachine-readable PoC index for this CVE (for automation).

Search for new PoCs

Search GitHub now — results may be empty or unverified.

Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.

Data snapshot:

Affected

Vendors Kestra Io Kestra

Products Kestra

Weakness (CWE)

  • 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)

CVSS vector

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

References and research data (JSON)

Unverified PoC candidates

Catalogue matches for further research. These repositories have not been validated as working exploits.

2 candidates

Additional exploitation reports

Source-specific reports, separate from CISA KEV. Repeated observations from one source are not independent confirmations.

Known Affected Software Configurations

VendorProductVersion range
KestraKestra< 1.0.45
KestraKestra≥ 1.1.0 and < 1.3.21

All CVSS metrics

  • CRITICAL 10 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
  • CRITICAL 10 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

Exploit-tagged references (not proof of a PoC)

Advisories

Technical & other

Sources: NVD · CVE.org · All sources and attribution · EPSS