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CVE-2026-32305

Traefik is an HTTP reverse proxy and load balancer. Versions 2.11.40 and below, 3.0.0-beta1 through 3.6.11, and 3.7.0-ea.1 are vulnerable to mTLS bypass through the TLS SNI pre-sniffing logic related to fragmented ClientHello packets. When a TLS ClientHello is fragmented across multiple records, Traefik's SNI extraction may fail with an EOF and return an empty SNI. The TCP router then falls back to the default TLS configuration, which does not require client certificates by default. This allows
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c664516f2db87ed243ed9747469190d37c7a6952dade821b09ea011859ef6a2b
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
3

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 4 assertions

{"product":"traefik","vendor":"traefik","versions":[{"status":"affected","version":"< 2.11.41"},{"status":"affected","version":">= 3.0.0-beta1, < 3.6.11"},{"status":"affected","version":">= 3.7.0-ea.1, < 3.7.0-ea.2"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/cna/affected/0

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:openshift_devspaces:3.28::el9"],"defaultStatus":"affected","packageName":"devspaces/traefik-rhel9","product":"Red Hat OpenShift Dev Spaces 3.28","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1779786779","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/affected/1

{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:openshift_devspaces:3.27::el9"],"defaultStatus":"affected","packageName":"devspaces/traefik-rhel9","product":"Red Hat OpenShift Dev Spaces 3.27","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1776718585","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_gitops:1"],"defaultStatus":"affected","packageName":"openshift-gitops-1/argo-rollouts-rhel8","product":"Red Hat OpenShift GitOps","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/affected/2
cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.8,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.3,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/metrics/1/cvssV3_1
cwe · 3 assertions

{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-1188","description":"CWE-1188: Insecure Default Initialization of Resource","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-179","description":"Incorrect Behavior Order: Early Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/problemTypes/0/descriptions/0

Affected products and versions

4 source assertions
{"product":"traefik","vendor":"traefik","versions":[{"status":"affected","version":"< 2.11.41"},{"status":"affected","version":">= 3.0.0-beta1, < 3.6.11"},{"status":"affected","version":">= 3.7.0-ea.1, < 3.7.0-ea.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/cna/affected/0
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:openshift_devspaces:3.28::el9"],"defaultStatus":"affected","packageName":"devspaces/traefik-rhel9","product":"Red Hat OpenShift Dev Spaces 3.28","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1779786779","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/affected/1
{"collectionURL":"https://catalog.redhat.com/software/containers/","cpes":["cpe:/a:redhat:openshift_devspaces:3.27::el9"],"defaultStatus":"affected","packageName":"devspaces/traefik-rhel9","product":"Red Hat OpenShift Dev Spaces 3.27","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1776718585","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_gitops:1"],"defaultStatus":"affected","packageName":"openshift-gitops-1/argo-rollouts-rhel8","product":"Red Hat OpenShift GitOps","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/affected/2

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":7.8,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":8.3,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/metrics/1/cvssV3_1

CWE assertions

3 source assertions
{"cweId":"CWE-287","description":"CWE-287: Improper Authentication","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-1188","description":"CWE-1188: Insecure Default Initialization of Resource","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-179","description":"Incorrect Behavior Order: Early Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/problemTypes/0/descriptions/0

Source references

9 source assertions
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:10175"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/references/3
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:21772"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/references/4
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-32305"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/references/0
{"name":"RHBZ#2449595","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2449595"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/references/1
{"name":"https://github.com/traefik/traefik/releases/tag/v2.11.41","tags":["x_refsource_MISC"],"url":"https://github.com/traefik/traefik/releases/tag/v2.11.41"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/cna/references/1
{"name":"https://github.com/traefik/traefik/releases/tag/v3.6.11","tags":["x_refsource_MISC"],"url":"https://github.com/traefik/traefik/releases/tag/v3.6.11"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/cna/references/2
{"name":"https://github.com/traefik/traefik/releases/tag/v3.7.0-ea.2","tags":["x_refsource_MISC"],"url":"https://github.com/traefik/traefik/releases/tag/v3.7.0-ea.2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/cna/references/3
{"name":"https://github.com/traefik/traefik/security/advisories/GHSA-wvvq-wgcr-9q48","tags":["x_refsource_CONFIRM"],"url":"https://github.com/traefik/traefik/security/advisories/GHSA-wvvq-wgcr-9q48"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/cna/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32305.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1de8ae2109ed6fc6601ab81c26e2818ada2ddac3b7f6cce197ff697607aefcdb · sha256:b7f170ac460edb4c… · /containers/adp/1/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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