CVE-2026-88010

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Source
https://cve.org/CVERecord?id=CVE-2026-88010
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88010.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-88010
Aliases
Published
2026-09-22T15:38:25Z
Modified
2026-09-24T03:46:58Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
Traefik: BasicAuth singleflight coalescing reintroduces an unauthenticated username-enumeration timing oracle
Details

Traefik is an open source HTTP reverse proxy and load balancer. From 3.6.11 until 3.7.13, checkPassword in pkg/middlewares/auth/basic_auth.go constructs the BasicAuth singleflight key from the submitted password and stored secret. Concurrent requests for absent usernames therefore coalesce on one key while configured usernames perform separate password hashes, creating an unauthenticated timing discrepancy that reveals whether a username exists. Sequential checks remain cost-equalized, Traefik v2 and Digest authentication are not affected, and the issue does not disclose credentials or bypass authentication. This issue is fixed in version 3.7.13.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-208"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88010.json"
}
References

Affected packages

Git / github.com/traefik/traefik

Affected ranges

Type
GIT
Repo
https://github.com/traefik/traefik
Events
Introduced
33219a0af86c41a8db81d37c444f65172bfb3e35
Fixed
ddc1bf4660b85fd61fafdd821eb8216fb1a0b130
Fixed
fc92cc118a0557a029c7019d5ee06665127b0f13
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "3.6.11"
        },
        {
            "fixed":  "3.7.13"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88010.json"