undici vulnerable to TLS certificate validation bypass via dropped requestTls in SOCKS5 ProxyAgent
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| undici | undici | unaffected |
|
Configuration 1 [-]
|
| Package | CPE | Advisory | Released Date |
|---|---|---|---|
| Red Hat Hardened Images | |||
| nodejs26-main-26.3.0-1.2.hum1 | cpe:/a:redhat:hummingbird:1 | RHSA-2026:22380 | 2026-06-02T00:00:00Z |
| rust-main-1.96.0-1.hum1 | cpe:/a:redhat:hummingbird:1 | RHSA-2026:22934 | 2026-06-03T00:00:00Z |
| nodejs25-main-25.9.0-1.1.hum1 | cpe:/a:redhat:hummingbird:1 | RHSA-2026:7378 | 2026-04-10T00:00:00Z |
| Vendor | Product | Versions | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Undici | Undici |
|
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-vmh5-mc38-953g | undici vulnerable to TLS certificate validation bypass via dropped requestTls in SOCKS5 ProxyAgent |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.459% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
| Type | Values Removed | Values Added |
|---|---|---|
| References |
|
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Undici
Undici undici |
|
| Vendors & Products |
Undici
Undici undici |
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Redhat
Redhat hummingbird |
|
| CPEs | cpe:/a:redhat:hummingbird:1 | |
| Vendors & Products |
Redhat
Redhat hummingbird |
|
| References |
| |
| Metrics |
threat_severity
|
threat_severity
|
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Impact: undici's ProxyAgent silently drops the requestTls option when configured with a SOCKS5 proxy URI (socks5:// or socks://). The target HTTPS connection through the SOCKS5 tunnel falls back to Node's default trust store, ignoring user-configured ca, cert, key, rejectUnauthorized, and servername settings. Applications that pin to an internal or corporate CA via requestTls.ca will, when their proxy URI is SOCKS5, get the default Mozilla CA bundle as the trust anchor instead. Any cert signed by any publicly-trusted CA for the target hostname is accepted, breaking the intended pin and enabling MITM read and tamper of the HTTPS exchange. Affected applications are those that use undici's ProxyAgent (or Socks5ProxyAgent directly) with SOCKS5 AND rely on requestTls for TLS scope restriction. The bug was introduced in undici 7.23.0 when SOCKS5 support was added. Patches: Upgrade to undici v7.28.0 or v8.5.0. Workarounds: No workaround is available within the SOCKS5 path. If a SOCKS5 proxy with TLS scope restriction is required and an upgrade is not yet possible, route the traffic through an HTTP-proxy ProxyAgent instead, where requestTls is honored correctly. | |
| Title | undici vulnerable to TLS certificate validation bypass via dropped requestTls in SOCKS5 ProxyAgent | |
| Weaknesses | CWE-295 | |
| References |
| |
| Metrics |
cvssV3_1
|