Traefik before 2.11.58 and 3.7.14 Race Condition in NTLM/Kerberos Round Tripper
Impact
Traefik versions before 2.11.58 and 3.7.14 have a race condition in NTLM and Kerberos authentication. Remote attackers can send concurrent requests to break connection-bound authentication or crash Traefik. Affected versions include 2.11.0 to 2.11.57 and 3.0.0 to 3.7.13.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Affected packages
Affected products
Vendor version evidence. Product records are separate from automatic dependency matching.
traefik · VulnCheck
traefik
2 ranges
traefik · VulnCheck
traefik
Package identity
pkg:golang/github.com/traefik/traefik/v2Explore github.com/traefik/traefik/v2 →Identity supplied by VulnCheck. Version matching requires compatible range evidence.
Compare with this publisher’s ranges. This does not inspect your installation.
affected
2.11.0 → before 2.11.58
semver versions
unaffected
2.11.58
semver versions
Other versions: unaffected
traefik · VulnCheck
traefik
2 ranges
traefik · VulnCheck
traefik
Package identity
pkg:golang/github.com/traefik/traefik/v3Explore github.com/traefik/traefik/v3 →Identity supplied by VulnCheck. Version matching requires compatible range evidence.
Compare with this publisher’s ranges. This does not inspect your installation.
affected
3.0.0 → before 3.7.14
semver versions
unaffected
3.7.14
semver versions
Other versions: unaffected
Original source description
Traefik 2.11.x before 2.11.58 and 3.x before 3.7.14 contains a race condition in NTLM and Kerberos (Negotiate) backend authentication, where the per-connection sticky round tripper slot is read and written without synchronization. Remote attackers can send concurrent HTTP/2 or HTTP/3 requests over one connection to orphan backend connections, break connection-bound authentication, or crash Traefik.
Inside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-114641View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
Environment requirements
These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.
VulnCheck · platform conditions
Any condition may hold
Vulnerable product
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*From (inclusive): 2.11.0
Before: 2.11.58
Any condition may hold
Vulnerable product
cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*From (inclusive): 3.0.0
Before: 3.7.14
Original applicability statements
[
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*",
"versionStartIncluding": "2.11.0",
"versionEndExcluding": "2.11.58"
}
]
}
]
},
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.0.0",
"versionEndExcluding": "3.7.14"
}
]
}
]
}
]Contributing organizations · 2
Assigning organization
Additional data publisher
What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.