CVE-2026-85597
Last modified
CVE-2026-85597 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. Traefik before v2.11.55 and v3.0.0 through v3.7.10 contain a TLS option conflict resolution vulnerability that allows unauthenticated attackers to bypass client-certificate authentication by creating conflicting TLS options on multi-host routers. Attackers can reach protected backends by exploiting shared TLS resolution across multiple hostnames in a single router rule, causing the strict mTLS requirement to fall back to default options for all hosts..
Description
Traefik before v2.11.55 and v3.0.0 through v3.7.10 contain a TLS option conflict resolution vulnerability that allows unauthenticated attackers to bypass client-certificate authentication by creating conflicting TLS options on multi-host routers. Attackers can reach protected backends by exploiting shared TLS resolution across multiple hostnames in a single router rule, causing the strict mTLS requirement to fall back to default options for all hosts.
Metrics
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| traefik | traefik | < 2.11.55 |
| traefik | traefik | >= 3.0.0, <= 3.7.10 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-85597?
How severe is CVE-2026-85597?
How do I fix CVE-2026-85597?
How Strix Helps
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-85591phpMyFAQ versions before 4.1.8 contain an authentication byp…7.1
- CVE-2026-85592phpMyFAQ before 4.1.8 contains an authorization bypass vulne…3.7
- CVE-2026-85593phpMyFAQ versions before 4.1.8 contain a stored cross-site s…5.4
- CVE-2026-85594Traefik versions from v3.7.1 fail to enforce crossProviderNa…7
- CVE-2026-85595Traefik versions before v2.11.55 and versions v3.0.0 through…9.3
- CVE-2026-85596Traefik versions >= v3.7.0 and <= v3.7.10 contain an authent…8.2
- CVE-2026-85598Grav versions 2.0.0 through 2.0.17 fail to apply save-time X…6.4
- CVE-2026-85599Grav Shortcode Core before 6.2.5 contains stored cross-site …7.2
- CVE-2026-8560Heap buffer overflow in SwiftShader in Google Chrome on Mac …4.3
- CVE-2026-85600Grav Admin (getgrav/grav-plugin-admin2) versions <= 2.0.19 c…5.4
- CVE-2026-85601Grav Admin before 2.0.20 fails to sanitize output from marke…5.4
- CVE-2026-85602The Grav Form plugin (getgrav/grav-plugin-form) versions 8.0…5.3
Are you affected by CVE-2026-85597?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST