CVE-2026-16652

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3% (17th percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Temporal Server did not bound the work performed while searching for a Schedule's next action time. An authenticated caller with namespace write permission could create or update a Schedule that combines a fine-grained cadence with an exclusion calendar that rejects every candidate time, causing the server to evaluate excluded candidates without a per-search work budget. This can consume excessive CPU in Frontend and Schedule worker components. A persisted specification can also cause its backing Schedule Workflow to repeatedly fail and retry, allowing CPU consumption to continue without additional requests until the Schedule is deleted or its backing Workflow is terminated. Repeated or parallel exploitation can deny service. The issue affects availability only; it does not expose or modify Workflow data.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
32
EG Risk 32/100CISA SSVC

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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
17th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 21, 2026

Last Modified

September 22, 2026

Advisory Details (4)

Auto-updated Sep 21, 2026
Patch available. Sources: github_commit, github_release, github_pr.
github_release Patch Available

v1.31.3

Patch available: temporalio/temporal v1.31.3

https://github.com/temporalio/temporal/releases/tag/v1.31.3
github_release Patch Available

v1.30.7

Patch available: temporalio/temporal v1.30.7

https://github.com/temporalio/temporal/releases/tag/v1.30.7
github_commit

commit c10c730e53ae (temporalio/temporal)

Fix landed in temporalio/temporal commit c10c730e53ae — awaiting tagged release

https://github.com/temporalio/temporal/commit/c10c730e53ae394fffaefe44ba3722150fe40720
github_pr

List matching perf

Fix merged in temporalio/temporal PR #11014 on 2026-07-15 — awaiting tagged release

https://github.com/temporalio/temporal/pull/11014

Vendor Advisories for CVE-2026-16652(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 27× in last 7d / 56× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-10-05 00:47 UTCEG score recompute
  2. 2026-10-05 00:46 UTCGHSA enrichment
  3. 2026-10-04 23:21 UTCEPSS rescore
  4. 2026-10-04 12:43 UTCGHSA enrichment
  5. 2026-10-04 00:41 UTCEG score recompute
  6. 2026-10-04 00:41 UTCGHSA enrichment
  7. 2026-10-03 14:25 UTCEPSS rescore
  8. 2026-10-03 12:40 UTCGHSA enrichment
  9. 2026-10-03 00:39 UTCEG score recompute
  10. 2026-10-03 00:39 UTCGHSA enrichment
  11. 2026-10-02 12:38 UTCGHSA enrichment
  12. 2026-10-02 00:37 UTCEG score recompute
  13. 2026-10-02 00:37 UTCGHSA enrichment
  14. 2026-10-01 19:49 UTCEPSS rescore
  15. 2026-10-01 12:36 UTCGHSA enrichment
  16. 2026-10-01 00:35 UTCEG score recompute
  17. 2026-10-01 00:34 UTCGHSA enrichment
  18. 2026-09-30 15:02 UTCEPSS rescore
  19. 2026-09-30 12:24 UTCGHSA enrichment
  20. 2026-09-30 00:21 UTCEG score recompute
  21. 2026-09-30 00:21 UTCGHSA enrichment
  22. 2026-09-29 15:20 UTCEPSS rescore
  23. 2026-09-29 08:32 UTCEG score recompute
  24. 2026-09-29 08:32 UTCGHSA enrichment
  25. 2026-09-28 20:31 UTCEG score recompute
Show 31 more
  1. 2026-09-28 20:31 UTCGHSA enrichment
  2. 2026-09-28 13:51 UTCEPSS rescore
  3. 2026-09-28 08:30 UTCGHSA enrichment
  4. 2026-09-27 20:28 UTCEG score recompute
  5. 2026-09-27 20:28 UTCGHSA enrichment
  6. 2026-09-27 13:47 UTCEPSS rescore
  7. 2026-09-27 08:27 UTCGHSA enrichment
  8. 2026-09-26 20:26 UTCEG score recompute
  9. 2026-09-26 20:26 UTCGHSA enrichment
  10. 2026-09-26 15:58 UTCEPSS rescore
  11. 2026-09-26 08:25 UTCEG score recompute
  12. 2026-09-26 08:25 UTCGHSA enrichment
  13. 2026-09-25 20:23 UTCGHSA enrichment
  14. 2026-09-25 08:00 UTCGHSA enrichment
  15. 2026-09-24 19:58 UTCEG score recompute
  16. 2026-09-24 19:58 UTCGHSA enrichment
  17. 2026-09-24 07:57 UTCGHSA enrichment
  18. 2026-09-23 19:56 UTCEG score recompute
  19. 2026-09-23 19:56 UTCGHSA enrichment
  20. 2026-09-23 07:55 UTCGHSA enrichment
  21. 2026-09-22 19:53 UTCGHSA enrichment
  22. 2026-09-22 16:29 UTCEG score recompute
  23. 2026-09-22 16:29 UTCGHSA enrichment
  24. 2026-09-22 04:26 UTCGHSA enrichment
  25. 2026-09-21 16:25 UTCEG score recompute
  26. 2026-09-21 16:25 UTCGHSA enrichment
  27. 2026-09-21 15:35 UTCEG score recompute
  28. 2026-09-21 15:35 UTCGHSA enrichment
  29. 2026-09-21 12:30 UTCEG score recompute
  30. 2026-09-21 11:35 UTCEG score recompute
  31. 2026-09-21 11:35 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-16652?
CVE-2026-16652 is a high vulnerability published on September 21, 2026. Temporal Server did not bound the work performed while searching for a Schedule's next action time. An authenticated caller with namespace write permission could create or update a Schedule that combines a fine-grained cadence with an exclusion calendar that rejects every candidate time, causing…
When was CVE-2026-16652 disclosed?
CVE-2026-16652 was first published on September 21, 2026, with the most recent update on September 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16652 actively exploited?
CVE-2026-16652 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-16652?
CVE-2026-16652 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-16652?
A fix for CVE-2026-16652 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-16652 are linked in the Vendor Advisories panel on this page.

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