CVE-2026-40213

HIGHNVD 7.47.4
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.4 under NVD CVSS v3. EPSS exploit probability: 0.2% (10th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 3 sources updated this week

Also known asEUVD-2026-28455 (ENISA EUVD)Source: ENISA EUVD

7.4EG
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: 0.2%CVSS: 7.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

OpenStack Cyborg before 16.0.1 uses rule:allow (check_str='@') as the default policy for multiple API endpoints. This unconditionally authorizes any request carrying a valid Keystone token regardless of roles, project membership, or scope. An authenticated user with zero role assignments can complete various actions such as reprogramming FPGA bitstreams on arbitrary compute nodes via agent RPC.

CVSS v3
7.4
EG Score
7.4HIGHmedium confidence
EG Risk
33
EG Risk 33/100

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)
Severity74% × 45%
Impact severity (EG Severity): CVSS 7.4 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 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
0.2%
EPSS %ILE
10th
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 (7.4): severity, escalated by confirmed exploitation. This CVE's 7.4 is its impact severity (EG Severity), not escalated.

EG Severity
7.4 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). 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: 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.

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

May 7, 2026

Last Modified

October 26, 2026

Advisory Details (2)

Auto-updated May 7, 2026
Patch available.
Web page

oss-security - [OSSA-2026-011] OpenStack Cyborg: Multiple access control vulnerabilities in Cyborg accelerator management (CVE-2026-40213, CVE-2026-40214)

https://www.openwall.com/lists/oss-security/2026/05/07/6
Web page

Bug #2143263 “[OSSA-2026-011] rule:allow policy bypass exposes h...” : Bugs : Cyborg (OpenStack)

https://bugs.launchpad.net/openstack-cyborg/+bug/2143263

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython3-cyborg (16.0.0-2ubuntu0.1) @ resolute2026-10-26ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
cyborg14.0.0-3
  • every version up to 14.0.0-3+deb13u1: fixed in 14.0.0-3+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
cyborg14.0.0-3 ... 16.0.0~rc2-1 (10 versions)
  • every version up to 16.0.0+git+2026.04.26.b8edfa06f1-1: fixed in 16.0.0+git+2026.04.26.b8edfa06f1-1
—
PyPI(1)
PackageVulnerable rangeFix by version rangeDependents
openstack-cyborg0.1.0 ... 9.0.0.0rc1 (47 versions)
  • every version up to 16.0.1: fixed in 16.0.1
—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 12× in last 7d / 40× 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 99 of 235 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 136 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  2. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  3. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  4. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  5. 2026-10-26 00:27 UTCEG score recompute
  6. 2026-10-26 00:27 UTCVendor advisory
  7. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  8. 2026-10-25 14:31 UTCEG score recompute
  9. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  10. 2026-10-24 01:31 UTCEG score recompute
  11. 2026-10-24 01:31 UTCVendor advisory
  12. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  13. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  14. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  15. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  16. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  17. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  18. 2026-10-18 03:43 UTCEG score recompute
  19. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  20. 2026-10-17 14:54 UTCEG score recompute
  21. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  22. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  23. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  24. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  25. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
Show 74 more
  1. 2026-10-12 16:09 UTCEG score recompute
  2. 2026-10-11 19:52 UTCEG score recompute
  3. 2026-10-11 17:05 UTCEG score recompute
  4. 2026-10-11 14:31 UTCEG score recompute
  5. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  6. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  7. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  8. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  9. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  10. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  11. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  12. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  13. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  14. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  15. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  16. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  17. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  18. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  19. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  22. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  23. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  24. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  25. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  26. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  27. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  28. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  29. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  30. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  31. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  32. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  33. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  34. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  35. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  36. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  37. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  38. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  39. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  40. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  41. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  42. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  43. 2026-08-23 19:32 UTCEG score recompute
  44. 2026-08-23 19:32 UTCVendor advisory
  45. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  46. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  47. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  48. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  49. 2026-08-17 12:42 UTCEG score recompute
  50. 2026-08-17 12:42 UTCVendor advisory
  51. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  52. 2026-08-16 04:42 UTCEG score recompute
  53. 2026-08-16 04:42 UTCVendor advisory
  54. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  55. 2026-08-15 02:18 UTCEG score recompute
  56. 2026-08-15 02:18 UTCVendor advisory
  57. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  58. 2026-08-14 14:47 UTCVendor advisory
  59. 2026-08-14 03:17 UTCEG score recompute
  60. 2026-08-14 03:17 UTCVendor advisory
  61. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  62. 2026-08-13 04:23 UTCVendor advisory
  63. 2026-08-12 16:51 UTCEG score recompute
  64. 2026-08-12 16:51 UTCVendor advisory
  65. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  66. 2026-08-11 15:54 UTCEG score recompute
  67. 2026-08-11 15:54 UTCVendor advisory
  68. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  69. 2026-08-11 01:24 UTCEG score recompute
  70. 2026-08-11 01:24 UTCVendor advisory
  71. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  72. 2026-08-10 13:00 UTCVendor advisory
  73. 2026-08-10 01:29 UTCVendor advisory
  74. 2026-08-09 13:58 UTCEG score recompute

Related CVEs(same product + same vendor + same CWE)

Same product

1 shown

Debian:13:cyborg

Same vendor

1 shown

ubuntu:USN-8413-1

Frequently asked(5)

What is CVE-2026-40213?
CVE-2026-40213 is a high-severity vulnerability; its CVE record was published on May 7, 2026. OpenStack Cyborg before 16.0.1 uses rule:allow (check_str='@') as the default policy for multiple API endpoints. This unconditionally authorizes any request carrying a valid Keystone token regardless of roles, project membership, or scope. An authenticated user with zero role assignments can…
When was the CVE record for CVE-2026-40213 published?
The CVE record for CVE-2026-40213 was published on May 7, 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 October 26, 2026; the record at its source may have been updated since.
Is CVE-2026-40213 actively exploited?
CVE-2026-40213 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-40213?
CVE-2026-40213 has a CVSS v3 base score of 7.4 (NVD).
How do I remediate CVE-2026-40213?
A fix for CVE-2026-40213 is available: update to the fixed version the vendor names in its advisory.

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