CVE-2026-122312

HIGHPre-NVD 7.77.7
EchelonGraph scoreHIGH confidence

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

Score 7.7 from GitHub Security Advisory (severity: HIGH) published 2026-11-05. A secondary CVSS source baseline 7.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-117223 (ENISA EUVD) · GHSA-j5qr-vw59-8jh6 (GitHub Security Advisories)Source: ENISA EUVD

7.7EG
EchelonGraph verdictPlan mitigationNo release containing the referenced fix is confirmed: check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.7Exploit: None knownExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

Kyverno from 1.19.1 before 1.19.2 contains a namespace isolation bypass in APICall Fetch() in pkg/engine/apicall/apiCall.go because path.Clean treats '?' as a path character, letting the namespace regex match segments inside the query string. Users who can create namespaced policies can supply a URLPath like /api/v1/nodes?x=/namespaces/default/ that passes validation while client-go requests the cluster-scoped endpoint, reading resources outside their namespace.

CVSS v3
7.7
EG Score
7.7HIGHhigh confidence
EG Risk
35
EG Risk 35/100

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)
Severity77% × 45%
Impact severity (EG Severity): CVSS 7.7 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.3%
EPSS %ILE
21st
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 (7.7): severity, escalated by confirmed exploitation. This CVE's 7.7 is its impact severity (EG Severity), not escalated.

EG Severity
7.7 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS. 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.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

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.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

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

November 5, 2026

Last Modified

November 10, 2026

Advisory Details (3)

Auto-updated Nov 5, 2026
🔬 Proof of concept available. Fix referenced — no release confirmed yet. Sources: github, github_commit.
Web page

Kyverno 1.19.1 before 1.19.2 Namespace Isolation Bypass via APICall URLPath Query String | Advisories | VulnCheck

https://www.vulncheck.com/advisories/kyverno-1.19.1-before-1.19.2-namespace-isolation-bypass-via-apicall-urlpath-query-string
GitHub commit

commit f67231def576 (kyverno/kyverno)

Fix landed in kyverno/kyverno commit f67231def576 — awaiting tagged release

https://github.com/kyverno/kyverno/commit/f67231def576eb0ad153dd8cbfc836908ab14c14
GitHub advisoryMentions a patch (unverified)🟡 PoC Available

Server-Side Request Forgery (SSRF) and Improper Privilege Management in kyverno · Advisory · kyverno/kyverno · GitHub

https://github.com/kyverno/kyverno/security/advisories/GHSA-pcx2-xcq4-65vf

Vendor Advisories for CVE-2026-122312(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 11× in last 7d / 16× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

  1. 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  2. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  3. 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  4. 2026-11-11 03:48 UTCGHSA enrichmentGHSA-j5qr-vw59-8jh6 · GitHub severity HIGH · GitHub CVSS 7.7
  5. 2026-11-10 20:53 UTCEchelonGraph re-scored
  6. 2026-11-10 20:53 UTCGHSA enrichmentGHSA-j5qr-vw59-8jh6 · GitHub severity HIGH · GitHub CVSS 7.7
  7. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  8. 2026-11-09 17:27 UTCEchelonGraph re-scored
  9. 2026-11-09 17:27 UTCGHSA enrichmentGHSA-j5qr-vw59-8jh6 · GitHub severity HIGH · GitHub CVSS 7.7
  10. 2026-11-09 17:00 UTCEchelonGraph re-scored
  11. 2026-11-09 17:00 UTCGHSA enrichmentGHSA-j5qr-vw59-8jh6 · GitHub severity HIGH · GitHub CVSS 7.7
  12. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  13. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  14. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  15. 2026-11-06 16:36 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  16. 2026-11-05 16:36 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  17. 2026-11-05 15:07 UTCEchelonGraph re-scored
  18. 2026-11-05 15:07 UTCGHSA enrichmentGHSA-j5qr-vw59-8jh6 · GitHub severity HIGH · GitHub CVSS 7.7
  19. 2026-11-05 03:27 UTCEchelonGraph re-scored
  20. 2026-11-05 03:03 UTCENISA EUVD ID recordedEUVD-2026-117223 · Source: ENISA EUVD
  21. 2026-11-05 02:34 UTCEchelonGraph re-scoredFirst assessed: 7.7 HIGH
  22. 2026-11-05 02:33 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-122312?
CVE-2026-122312 is a high-severity vulnerability; its CVE record was published on November 5, 2026. Kyverno from 1.19.1 before 1.19.2 contains a namespace isolation bypass in APICall Fetch() in pkg/engine/apicall/apiCall.go because path.Clean treats '?' as a path character, letting the namespace regex match segments inside the query string. Users who can create namespaced policies can supply a…
When was CVE-2026-122312 made public?
CVE-2026-122312 was made public on October 21, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on November 5, 2026. EchelonGraph's copy of the record carries a last-modified date of November 10, 2026; the record at its source may have been updated since.
Is CVE-2026-122312 actively exploited?
CVE-2026-122312 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-122312?
CVE-2026-122312 has a CVSS base score of 7.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-122312?
A fix for CVE-2026-122312 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-122312 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-122312

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