CVE-2026-53576

CRITICALPre-NVD 10.010.0
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This critical-severity CVE scores 10.0 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 3.3% (88th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
10.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 3.3%CVSS: 10.0Exploit: No code on recordExposed services: Not assessed

The CVE record names the fixed release — apply it.

Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter for the REST API (@Filter("/api/v1/**")) treats any request whose path ends in /configs as the public instance-config endpoint and forwards it without a credential check. kestra addresses its resources by URL path segments that the caller chooses (/api/v1/{tenant}/flows/{namespace}, /api/v1/{tenant}/executions/{namespace}/{id}, /api/v1/{tenant}/namespaces/{namespace}/kv/{key}). An anonymous caller picks the literal configs as the final segment, and the request bypasses Basic-Auth entirely. Because the bypass reaches the flow-create and execution-trigger routes, an unauthenticated caller creates a flow containing a Shell or Process task and runs it. The task executes as root inside the kestra container. The official docker-compose.yml mounts /var/run/docker.sock, so root in the container reaches the host Docker daemon. This vulnerability is fixed in 1.0.45 and 1.3.21.

CVSS v3
10.0
EG Score
10.0CRITICALmedium confidence
EG Risk
76
EG Risk 76/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity100% × 45%
The EG Score, 10.0 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
3.3%
EPSS %ILE
88th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

The CVE record names the fixed release. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

June 26, 2026

Last Modified

July 1, 2026

Advisory Details (1)

Auto-updated Oct 15, 2026
🔬 Proof of concept available. Fix named in the CVE record. Sources: github.
GitHub advisoryMentions a patch (unverified)🟡 PoC Available

Unauthenticated RCE via /configs path-suffix auth-filter bypass · Advisory · kestra-io/kestra · GitHub

https://github.com/kestra-io/kestra/security/advisories/GHSA-2q47-568g-9h4f

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 15× in last 7d / 33× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 160 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 60 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-16 16:42 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  2. 2026-10-16 15:29 UTCEG score recompute
  3. 2026-10-15 16:32 UTCEPSS rescoreEPSS 3.3% · 88th percentile
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  5. 2026-10-14 16:33 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  6. 2026-10-14 09:35 UTCEG score recompute
  7. 2026-10-13 16:34 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  8. 2026-10-13 07:14 UTCEG score recompute
  9. 2026-10-12 16:34 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  10. 2026-10-12 15:57 UTCEG score recompute
  11. 2026-10-11 19:40 UTCEG score recompute
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  13. 2026-10-11 14:19 UTCEG score recompute
  14. 2026-10-11 13:49 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  15. 2026-10-10 20:00 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  16. 2026-10-09 20:07 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  17. 2026-10-08 17:12 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  19. 2026-10-06 15:18 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  20. 2026-10-05 17:43 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  21. 2026-10-03 14:26 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  22. 2026-10-02 17:56 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  23. 2026-10-01 19:50 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  24. 2026-09-30 15:03 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  25. 2026-09-29 15:22 UTCEPSS rescoreEPSS 3.3% · 88th percentile
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  1. 2026-09-28 13:51 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  2. 2026-09-27 13:48 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  3. 2026-09-26 15:59 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  4. 2026-09-24 14:04 UTCEPSS rescoreEPSS 3.3% · 88th percentile
  5. 2026-09-23 17:54 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  6. 2026-09-23 07:41 UTCEG score recompute
  7. 2026-09-18 19:28 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  8. 2026-09-18 07:07 UTCEG score recompute
  9. 2026-09-16 14:08 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  10. 2026-09-16 05:15 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  11. 2026-09-14 00:56 UTCEG score recompute
  12. 2026-09-13 16:47 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  13. 2026-09-12 15:20 UTCEG score recompute
  14. 2026-09-11 14:53 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  15. 2026-09-10 09:35 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  16. 2026-09-08 22:01 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  17. 2026-09-07 16:01 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  18. 2026-09-06 14:50 UTCEG score recompute
  19. 2026-09-06 13:47 UTCEPSS rescoreEPSS 3.2% · 87th percentile
  20. 2026-09-04 05:06 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  21. 2026-09-02 14:12 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  22. 2026-09-01 13:54 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  23. 2026-09-01 04:40 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  24. 2026-08-30 23:29 UTCEG score recompute
  25. 2026-08-30 19:17 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  26. 2026-08-30 19:12 UTCEG score recompute
  27. 2026-08-30 01:22 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  28. 2026-08-28 21:41 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  29. 2026-08-27 22:52 UTCEG score recompute
  30. 2026-08-27 14:25 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  31. 2026-08-26 14:46 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  32. 2026-08-25 13:49 UTCEPSS rescoreEPSS 3.3% · 87th percentile
  33. 2026-08-24 21:47 UTCEG score recompute
  34. 2026-08-24 12:44 UTCEG score recompute
  35. 2026-08-23 01:02 UTCEG score recompute
  36. 2026-08-23 00:19 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  37. 2026-08-22 01:31 UTCEG score recompute
  38. 2026-08-21 23:49 UTCEPSS rescoreEPSS 2.2% · 81st percentile
  39. 2026-08-21 00:14 UTCEG score recompute
  40. 2026-08-20 22:55 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  41. 2026-08-20 06:29 UTCEG score recompute
  42. 2026-08-19 17:04 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  43. 2026-08-18 23:30 UTCEG score recompute
  44. 2026-08-18 13:48 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  45. 2026-08-17 14:45 UTCEG score recompute
  46. 2026-08-17 13:47 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  47. 2026-08-16 18:17 UTCEG score recompute
  48. 2026-08-16 14:56 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  49. 2026-08-16 05:15 UTCEG score recompute
  50. 2026-08-16 02:14 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  51. 2026-08-15 04:52 UTCEG score recompute
  52. 2026-08-15 01:30 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  53. 2026-08-14 00:20 UTCEG score recompute
  54. 2026-08-13 22:00 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  55. 2026-08-12 15:41 UTCEG score recompute
  56. 2026-08-12 13:51 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  57. 2026-08-11 15:14 UTCEG score recompute
  58. 2026-08-11 02:59 UTCEG score recompute
  59. 2026-08-11 00:00 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  60. 2026-08-09 14:21 UTCEG score recompute
  61. 2026-08-09 13:46 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  62. 2026-08-08 18:01 UTCEG score recompute
  63. 2026-08-08 16:37 UTCEPSS rescoreEPSS 2.2% · 80th percentile
  64. 2026-08-07 17:36 UTCEG score recompute
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  66. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  67. 2026-08-06 09:02 UTCEG score recompute
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  69. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  70. 2026-08-04 18:55 UTCEG score recompute
  71. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  72. 2026-08-04 14:51 UTCEG score recompute
  73. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  74. 2026-08-03 13:55 UTCEG score recompute
  75. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.6% · 44th percentile

Public detection templates

(1 reference)

A public Nuclei detection template is referenced for this CVE. A detection template checks whether a system is affected; it is not necessarily exploit code.

  • Nucleihttp/cves/2026/CVE-2026-53576.yaml
    Published Aug 6, 2026

    Kestra <= 1.3.20 - Remote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-53576?
CVE-2026-53576 is a critical-severity vulnerability; its CVE record was published on June 26, 2026. Kestra is an open-source, event-driven orchestration platform. Prior to 1.0.45 and 1.3.21, the authentication filter for the REST API (@Filter("/api/v1/")) treats any request whose path ends in /configs as the public instance-config endpoint and forwards it without a credential check. kestra…
When was the CVE record for CVE-2026-53576 published?
The CVE record for CVE-2026-53576 was published on June 26, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 1, 2026; the record at its source may have been updated since.
Is CVE-2026-53576 actively exploited?
CVE-2026-53576 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 3.3% probability of exploitation in the next 30 days (88th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53576?
CVE-2026-53576 has a CVSS base score of 10.0 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53576?
The CVE record for CVE-2026-53576 names the fix: "This vulnerability is fixed in 1.0.45 and 1.3.21."

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