CVE-2026-88878

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Source

https://cve.org/CVERecord?id=CVE-2026-88878

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88878.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-88878

Aliases

Published

2026-09-10T13:05:30Z

Modified

2026-09-12T03:30:25Z

Severity

6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator

Summary

Traefik v2.8.2 through v3.6 HTTP/3 Timeout Bypass

Details

Traefik is an HTTP reverse proxy and load balancer. In versions >= v2.8.2 through <= v2.11.55 and >= v3.0.0 through <= v3.7.11, the entryPoints..transport.respondingTimeouts settings — notably readTimeout, which is enabled by default at 60s — are not applied to the HTTP/3 request path. readTimeout is enforced as a deadline on the underlying TCP connection, which cannot be applied to a QUIC stream, and Traefik's HTTP/3 server is constructed without any timeout. As a result, on entry points with HTTP/3 enabled, an unauthenticated remote client that trickles request body bytes can hold a request open indefinitely and, with it, one upstream connection per request, exhausting bounded backend connection pools and causing denial of service. The issue was introduced in v2.8.2 when a quic-go API change removed the embedded http.Server that carried these timeouts. Fixed in v2.11.56 and v3.7.12.

Database specific

{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88878.json"
}

References

Affected packages

Git / github.com/traefik/traefik

Affected ranges

Type

GIT

Repo

https://github.com/traefik/traefik

Events

Introduced

23c26d64eeb72eaecaecedc31ca740e83304fde2

Last Affected

fc92cc118a0557a029c7019d5ee06665127b0f13

Introduced

d99d2f95e66a28ee8180634dc80fdf13ba68c62a

Last Affected

fc92cc118a0557a029c7019d5ee06665127b0f13

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "2.8.2"
        },
        {
            "last_affected": "3.7.13"
        },
        {
            "introduced": "3.0.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88878.json"