CVE-2026-65601

HIGHNVD 8.88.8
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 8.8 under NVD CVSS v3. EPSS exploit probability: 0.5% (44th 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

Also known asEUVD-2026-47645 (ENISA EUVD) · GHSA-6mxq-jr92-3h2r (GitHub Security Advisories) · GHSA-qq9q-x9w4-chhj (GitHub Security Advisories) · GO-2026-6198 (OSV.dev)Source: ENISA EUVD

8.8EG
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: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API provider. When resolving HTTPRoute.spec.rules[].backendRefs[].filters[].extensionRef, Traefik used the backend Service namespace instead of the HTTPRoute namespace. A low-privileged route author holding a ReferenceGrant for a cross-namespace Service could therefore bind a Traefik Middleware from the backend namespace without a separate grant for that middleware, potentially injecting trusted reverse-proxy identity headers into downstream requests. The issue is fixed in version 3.7.7.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100

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)
Severity88% × 45%
Impact severity (EG Severity): CVSS 8.8 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
44th
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 (8.8): severity, escalated by confirmed exploitation. This CVE's 8.8 is its impact severity (EG Severity), not escalated.

EG Severity
8.8 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
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-10). 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

July 22, 2026

Last Modified

October 8, 2026

Advisory Details (3)

Auto-updated Jul 22, 2026
Patch available. Sources: github, github_commit.
Web pageMentions a patch (unverified)

Traefik before 3.7.7 Namespace Confusion via HTTPRoute ExtensionRef | Advisories | VulnCheck

https://www.vulncheck.com/advisories/traefik-before-namespace-confusion-via-httproute-extensionref
GitHub commit

commit 26c96a3935ca (traefik/traefik)

Fix landed in traefik/traefik commit 26c96a3935ca — awaiting tagged release

https://github.com/traefik/traefik/commit/26c96a3935cafb473f4a5bae1886560d9aa4e4f0
GitHub advisoryMentions a patch (unverified)

Traefik Gateway API HTTPRoute BackendRef ExtensionRef Namespace Confusion · Advisory · traefik/traefik · GitHub

https://github.com/traefik/traefik/security/advisories/GHSA-qq9q-x9w4-chhj

Vendor Advisories for CVE-2026-65601(2)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatdevspaces/traefik-rhel9:17877567992026-09-01redhat
goTraefik @ 3.7.7 (fixes >= 3.7.0, < 3.7.7)—ghsa

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

(2 across 1 ecosystem)
Go(2)
PackageVulnerable rangeFix by version rangeDependents
github.com/traefik/traefik—
  • every version on: no fix on record
—
Traefik—
  • 3.7.0 up to 3.7.7: fixed in 3.7.7
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 37× 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.

Showing the most recent 100 of 264 rows 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 164 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  2. 2026-11-11 16:40 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-11-11 07:02 UTCEchelonGraph re-scored
  4. 2026-11-11 07:02 UTCVendor advisory
  5. 2026-11-11 07:02 UTCGHSA enrichmentGHSA-qq9q-x9w4-chhj · GitHub severity MODERATE
  6. 2026-11-10 16:45 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  7. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  8. 2026-11-08 16:40 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  9. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-11-06 16:39 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  11. 2026-11-05 16:38 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  12. 2026-11-04 16:36 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  13. 2026-11-04 06:14 UTCEchelonGraph re-scored
  14. 2026-11-04 06:14 UTCVendor advisory
  15. 2026-11-04 06:14 UTCGHSA enrichmentGHSA-qq9q-x9w4-chhj · GitHub severity MODERATE
  16. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  17. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  18. 2026-11-01 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  19. 2026-11-01 07:40 UTCGHSA enrichmentGHSA-qq9q-x9w4-chhj · GitHub severity MODERATE
  20. 2026-11-01 07:40 UTCEchelonGraph re-scored
  21. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  22. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  23. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  24. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  25. 2026-10-28 05:17 UTCEchelonGraph re-scored
Show 75 more
  1. 2026-10-28 05:17 UTCVendor advisory
  2. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  3. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  4. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  5. 2026-10-25 14:11 UTCEchelonGraph re-scored
  6. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  7. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  10. 2026-10-20 18:41 UTCEchelonGraph re-scored
  11. 2026-10-20 18:41 UTCVendor advisory
  12. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  13. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  15. 2026-10-18 03:21 UTCEchelonGraph re-scored
  16. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  18. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  19. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  21. 2026-10-13 11:13 UTCEchelonGraph re-scored
  22. 2026-10-13 11:13 UTCVendor advisory
  23. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  24. 2026-10-12 15:46 UTCEchelonGraph re-scored
  25. 2026-10-11 19:31 UTCEchelonGraph re-scored
  26. 2026-10-11 16:47 UTCEchelonGraph re-scored
  27. 2026-10-11 14:08 UTCEchelonGraph re-scored
  28. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  29. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  30. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  31. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  32. 2026-10-08 16:39 UTCVendor advisory
  33. 2026-10-08 16:03 UTCEchelonGraph re-scored
  34. 2026-10-08 16:03 UTCVendor advisory
  35. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  36. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  37. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  38. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  39. 2026-10-04 13:27 UTCEchelonGraph re-scored
  40. 2026-10-04 13:27 UTCVendor advisory
  41. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  42. 2026-10-03 03:35 UTCEchelonGraph re-scored
  43. 2026-10-03 03:35 UTCVendor advisory
  44. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  45. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  46. 2026-10-01 06:30 UTCEchelonGraph re-scored
  47. 2026-10-01 06:30 UTCVendor advisory
  48. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  49. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  50. 2026-09-28 05:19 UTCEchelonGraph re-scored
  51. 2026-09-28 05:19 UTCVendor advisory
  52. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  53. 2026-09-24 02:10 UTCEchelonGraph re-scored
  54. 2026-09-24 02:10 UTCVendor advisory
  55. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  56. 2026-09-23 11:37 UTCVendor advisory
  57. 2026-09-23 00:01 UTCEchelonGraph re-scored
  58. 2026-09-23 00:01 UTCVendor advisory
  59. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  60. 2026-09-20 02:15 UTCEchelonGraph re-scored
  61. 2026-09-20 02:15 UTCVendor advisory
  62. 2026-09-18 22:42 UTCEchelonGraph re-scored
  63. 2026-09-18 22:42 UTCVendor advisory
  64. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  65. 2026-09-18 03:11 UTCEchelonGraph re-scored
  66. 2026-09-18 03:11 UTCVendor advisory
  67. 2026-09-17 02:13 UTCEchelonGraph re-scored
  68. 2026-09-17 02:13 UTCVendor advisory
  69. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  70. 2026-09-16 07:05 UTCEchelonGraph re-scored
  71. 2026-09-16 07:05 UTCVendor advisory
  72. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  73. 2026-09-14 10:17 UTCVendor advisory
  74. 2026-09-13 22:26 UTCEchelonGraph re-scored
  75. 2026-09-13 22:26 UTCVendor advisory

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

Frequently asked(5)

What is CVE-2026-65601?
CVE-2026-65601 is a high-severity vulnerability; its CVE record was published on July 22, 2026. Traefik versions 3.7.0 through 3.7.6 contain a namespace confusion vulnerability in the Kubernetes Gateway API provider. When resolving HTTPRoute.spec.rules[].backendRefs[].filters[].extensionRef, Traefik used the backend Service namespace instead of the HTTPRoute namespace. A low-privileged route…
When was CVE-2026-65601 made public?
CVE-2026-65601 was made public on July 9, 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 July 22, 2026. EchelonGraph's copy of the record carries a last-modified date of October 8, 2026; the record at its source may have been updated since.
Is CVE-2026-65601 actively exploited?
CVE-2026-65601 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (44th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-65601?
CVE-2026-65601 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-65601?
A fix for CVE-2026-65601 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-65601 are linked in the Vendor Advisories panel on this page.

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