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CVE-2026-53622

A flaw was found in Traefik, an HTTP reverse proxy and load balancer. This critical vulnerability in Traefik's HTTP/3 (QUIC) TLS configuration selection allows unauthenticated clients to bypass router-specific mutual Transport Layer Security (mTLS) enforcement. When HTTP/3 is enabled and a router uses wildcard host rules or case-insensitive hostname matching with client certificate authentication, an attacker can complete the QUIC handshake without presenting a certificate. This bypass grants un
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3cd4e349ca93b7debfe5b105cc7e49fa0191cbe4d478021a00e956236886078e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
3

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_devspaces:3"],"defaultStatus":"affected","packageName":"devspaces/traefik-rhel9","product":"Red Hat OpenShift Dev Spaces","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/adp/1/affected/0

{"product":"traefik","vendor":"traefik","versions":[{"status":"affected","version":"< 3.7.3"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/cna/affected/0
cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/adp/1/metrics/1/cvssV3_1

{"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:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/cna/metrics/0/cvssV4_0
cwe · 2 assertions

{"cweId":"CWE-288","description":"CWE-288: Authentication Bypass Using an Alternate Path or Channel","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-289","description":"Authentication Bypass by Alternate Name","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/adp/1/problemTypes/0/descriptions/0

Affected products and versions

2 source assertions
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift_devspaces:3"],"defaultStatus":"affected","packageName":"devspaces/traefik-rhel9","product":"Red Hat OpenShift Dev Spaces","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/adp/1/affected/0
{"product":"traefik","vendor":"traefik","versions":[{"status":"affected","version":"< 3.7.3"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":9.1,"baseSeverity":"CRITICAL","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/adp/1/metrics/1/cvssV3_1
{"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:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-288","description":"CWE-288: Authentication Bypass Using an Alternate Path or Channel","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-289","description":"Authentication Bypass by Alternate Name","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/adp/1/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-53622"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/adp/1/references/0
{"name":"RHBZ#2491924","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2491924"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/adp/1/references/1
{"name":"https://github.com/traefik/traefik/releases/tag/v3.7.3","tags":["x_refsource_MISC"],"url":"https://github.com/traefik/traefik/releases/tag/v3.7.3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/cna/references/1
{"name":"https://github.com/traefik/traefik/security/advisories/GHSA-9cr8-q42q-g8m7","tags":["x_refsource_CONFIRM"],"url":"https://github.com/traefik/traefik/security/advisories/GHSA-9cr8-q42q-g8m7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /containers/cna/references/0
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53622.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:87b5d38ca317caf767e9e541381011a1e97c5eead5725b7f366ca071790749b8 · sha256:a53de31e524ea39e… · /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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