CVE-2026-16652

HIGHPre-NVD 7.17.1
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (40th 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
Trending — 3 sources updated this week

Also known asEUVD-2026-83884 (ENISA EUVD) · GHSA-pv35-7w89-v65c (GitHub Security Advisories)Source: ENISA EUVD

7.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Fixed versions, as the CVE record's CNA (Temporal Technologies Inc.) states them: "Upgrade to Temporal Server 1.30.7, 1.31.3, or 1.32.0, as appropriate for the deployed minor release line, and retain a positive scheduler.specMaxIterations value."

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 32/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity71% × 45%
Impact severity (EG Severity): CVSS 7.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
40th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.1): severity, escalated by confirmed exploitation. This CVE's 7.1 is its impact severity (EG Severity), not escalated.

EG Severity
7.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-30). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). 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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (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

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 pull request

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 9× in last 7d / 66× 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 116 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 16 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  2. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-10-30 21:53 UTCEG score recompute
  5. 2026-10-30 21:53 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  6. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  7. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  8. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  9. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  10. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  11. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  12. 2026-10-25 14:46 UTCEG score recompute
  13. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  14. 2026-10-24 07:59 UTCEG score recompute
  15. 2026-10-24 07:58 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  16. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  17. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  18. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  19. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  20. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  21. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  22. 2026-10-18 04:00 UTCEG score recompute
  23. 2026-10-17 18:02 UTCEG score recompute
  24. 2026-10-17 18:02 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  25. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
Show 75 more
  1. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  2. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  3. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  4. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  5. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  6. 2026-10-12 16:30 UTCEG score recompute
  7. 2026-10-11 20:09 UTCEG score recompute
  8. 2026-10-11 18:32 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  9. 2026-10-11 17:21 UTCEG score recompute
  10. 2026-10-11 14:54 UTCEG score recompute
  11. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  12. 2026-10-11 05:56 UTCEG score recompute
  13. 2026-10-11 05:56 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  14. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  15. 2026-10-10 17:54 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  16. 2026-10-10 05:53 UTCEG score recompute
  17. 2026-10-10 05:53 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  18. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  19. 2026-10-09 17:50 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  20. 2026-10-09 05:21 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  21. 2026-10-08 17:19 UTCEG score recompute
  22. 2026-10-08 17:19 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  23. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  24. 2026-10-08 00:56 UTCEG score recompute
  25. 2026-10-08 00:56 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  26. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  27. 2026-10-07 12:55 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  28. 2026-10-07 00:53 UTCEG score recompute
  29. 2026-10-07 00:53 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  30. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  31. 2026-10-06 12:50 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  32. 2026-10-06 00:49 UTCEG score recompute
  33. 2026-10-06 00:49 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  34. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  35. 2026-10-05 12:48 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  36. 2026-10-05 00:47 UTCEG score recompute
  37. 2026-10-05 00:46 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  38. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  39. 2026-10-04 12:43 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  40. 2026-10-04 00:41 UTCEG score recompute
  41. 2026-10-04 00:41 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  42. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  43. 2026-10-03 12:40 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  44. 2026-10-03 00:39 UTCEG score recompute
  45. 2026-10-03 00:39 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  46. 2026-10-02 12:38 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  47. 2026-10-02 00:37 UTCEG score recompute
  48. 2026-10-02 00:37 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  49. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  50. 2026-10-01 12:36 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  51. 2026-10-01 00:35 UTCEG score recompute
  52. 2026-10-01 00:34 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  53. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  54. 2026-09-30 12:24 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  55. 2026-09-30 00:21 UTCEG score recompute
  56. 2026-09-30 00:21 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  57. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  58. 2026-09-29 08:32 UTCEG score recompute
  59. 2026-09-29 08:32 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  60. 2026-09-28 20:31 UTCEG score recompute
  61. 2026-09-28 20:31 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  62. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  63. 2026-09-28 08:30 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  64. 2026-09-27 20:28 UTCEG score recompute
  65. 2026-09-27 20:28 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  66. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  67. 2026-09-27 08:27 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  68. 2026-09-26 20:26 UTCEG score recompute
  69. 2026-09-26 20:26 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  70. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  71. 2026-09-26 08:25 UTCEG score recompute
  72. 2026-09-26 08:25 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  73. 2026-09-25 20:23 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  74. 2026-09-25 08:00 UTCGHSA enrichmentGHSA-pv35-7w89-v65c · GitHub severity HIGH
  75. 2026-09-24 19:58 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-16652?
CVE-2026-16652 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-16652 published?
The CVE record for CVE-2026-16652 was published on September 21, 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 September 22, 2026; the record at its source may have been updated since.
Is CVE-2026-16652 actively exploited?
CVE-2026-16652 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th 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. Fixed versions, as the CVE record's CNA (Temporal Technologies Inc.) states them: "Upgrade to Temporal Server 1.30.7, 1.31.3, or 1.32.0, as appropriate for the deployed minor release line, and retain a positive scheduler.specMaxIterations value." The vendor advisories EchelonGraph has for CVE-2026-16652 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-16652

Explore →

Is Your Infrastructure Affected by CVE-2026-16652?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.