CVE-2026-54765

HIGHNVD 8.58.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 73% of all CVEs by exploit prediction. 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, nvd
Trending — 3 sources updated this week
8.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Traefik is an open source HTTP reverse proxy and load balancer. From v3.7.0 prior to v3.7.6, Traefik's Kubernetes Gateway API provider may resolve two accepted HTTPRoutes that target the same backend Service:port but configure different backendRef filters to the same child service and apply only one route's filter set to all requests reaching that backend. In Gateway deployments where backendRef filters set security-sensitive headers, such as tenant identity, authorization context, or values the backend trusts, an attacker who can create an accepted HTTPRoute sharing the same backend Service:port may cause their route's filter context to be applied to another route's requests, potentially crossing namespace boundaries when a ReferenceGrant permits cross-namespace targeting. This issue is fixed in version v3.7.6.

CVSS v3
8.5
EG Score
8.5(medium)
EPSS
26.7%
KEV
Not listed

Published

July 6, 2026

Last Modified

July 8, 2026

Advisory Details (4)

Auto-updated Jul 7, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_release, github, github_commit.
github Patch Available🟡 PoC Available

Gateway HTTPRoute backendRef filters can leak backend context across routes sharing a Service:port · Advisory · traefik/traefik · GitHub

https://github.com/traefik/traefik/security/advisories/GHSA-6p8f-p8j2-rqmv
github_release Patch Available

v3.7.6

Patch available: traefik/traefik v3.7.6

https://github.com/traefik/traefik/releases/tag/v3.7.6
github_pr

Avoid collisions for Gateway API services names

Fix merged in traefik/traefik PR #13367 on 2026-06-18 — awaiting tagged release

https://github.com/traefik/traefik/pull/13367
github_commit

commit 8aada7a7d52e (traefik/traefik)

Fix landed in traefik/traefik commit 8aada7a7d52e — awaiting tagged release

https://github.com/traefik/traefik/commit/8aada7a7d52e4588a75386d8b86d270f6fe8d549

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 25× in last 7d / 30× 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. 2026-07-15 02:00 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-14 18:18 UTCEG score recompute
  4. 2026-07-14 05:15 UTCEG score recompute
  5. 2026-07-13 22:31 UTCEPSS rescore
  6. 2026-07-13 16:11 UTCEG score recompute
  7. 2026-07-13 06:13 UTCEPSS rescore
  8. 2026-07-13 06:13 UTCEPSS rescore
  9. 2026-07-13 03:06 UTCEG score recompute
  10. 2026-07-12 14:03 UTCEG score recompute
  11. 2026-07-12 05:46 UTCEPSS rescore
  12. 2026-07-12 00:57 UTCEG score recompute
  13. 2026-07-11 11:54 UTCEG score recompute
  14. 2026-07-11 08:27 UTCEPSS rescore
  15. 2026-07-11 08:27 UTCEPSS rescore
  16. 2026-07-10 22:49 UTCEG score recompute
  17. 2026-07-10 09:46 UTCEG score recompute
  18. 2026-07-09 20:41 UTCEG score recompute
  19. 2026-07-09 19:10 UTCEPSS rescore
  20. 2026-07-09 19:10 UTCEPSS rescore
  21. 2026-07-09 07:38 UTCEG score recompute
  22. 2026-07-08 18:34 UTCEG score recompute▲ 2.20
  23. 2026-07-08 15:16 UTCEPSS rescore
  24. 2026-07-08 15:16 UTCEPSS rescore
  25. 2026-07-08 04:32 UTCNVD updateCVSS v3 → 8.5 · severity → HIGH
Show 5 more
  1. 2026-07-07 19:51 UTCEG score recompute
  2. 2026-07-07 13:46 UTCEPSS rescore
  3. 2026-07-07 13:46 UTCEPSS rescore
  4. 2026-07-06 21:06 UTCEG score recompute
  5. 2026-07-06 21:04 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-54765?
CVE-2026-54765 is a high vulnerability published on July 6, 2026. Traefik is an open source HTTP reverse proxy and load balancer. From v3.7.0 prior to v3.7.6, Traefik's Kubernetes Gateway API provider may resolve two accepted HTTPRoutes that target the same backend Service:port but configure different backendRef filters to the same child service and apply only…
When was CVE-2026-54765 disclosed?
CVE-2026-54765 was first published in the National Vulnerability Database on July 6, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54765 actively exploited?
CVE-2026-54765 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 26.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-54765?
CVE-2026-54765 has a CVSS v3 base score of 8.5 (NVD).
How do I remediate CVE-2026-54765?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54765, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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