CVE catalog
CVE-2026-9697
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 No
- Severity
- High · CVSS 7.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.46% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | node-undici | sid | 8.12.2+dfsg+~cs3.2.3-2 | fixed |
| Debian | node-undici | forky | 8.10.2+dfsg+~cs3.2.2-1 | fixed |
| Debian | node-undici | trixie | 7.3.0+dfsg1+~cs24.12.11-1 | vulnerable |
| Debian | node-undici | bookworm | 5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4 | not affected |
| Debian | node-undici | bookworm-security | 5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3 | not affected |
| Cpe | undici | Not reported | 7.28.0 | fixed |
| Cpe | undici | Not reported | 8.5.0 | fixed |
| Cpe | undici | Not reported | 8.5.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | node-undici | source | sid | 8.5.0+dfsg+~cs3.2.0-1 | not yet assigned | Not reported | [1140363] |
| Debian | node-undici | source | forky | 8.5.0+dfsg+~cs3.2.0-1 | not yet assigned | Not reported | [1140363] |
| Debian | node-undici | source | trixie | (unfixed) | not yet assigned | Not reported | [1140363] |
| Debian | node-undici | source | bookworm | Not affected | unimportant | Not reported | [1140363] |
| Cpe | undici | cpe | Not reported | 7.28.0 | Not reported | Not reported | Not reported |
| Cpe | undici | cpe | Not reported | 8.5.0 | Not reported | Not reported | Not reported |
| Cpe | undici | cpe | Not reported | 8.5.0 | Not reported | NVD-CVE-2026-9697 | Not reported |
Notes
[trixie] node-undici: Minor issue
OpenFactory catalog packages
[Debian 13 (Trixie)]
- [libllhttp9.2]Affected
Source package: [node-undici]
Details (2)
9.2.1~7.3.0+dfsg1+~cs24.12.11-1· amd64 · trixieAffected
nvd · node-undici · debian · 13
9.2.1~7.3.0+dfsg1+~cs24.12.11-1· arm64 · trixieAffected
nvd · node-undici · debian · 13
- [libllhttp-dev]Affected
Source package: [node-undici]
Details (2)
9.2.1~7.3.0+dfsg1+~cs24.12.11-1· amd64 · trixieAffected
nvd · node-undici · debian · 13
9.2.1~7.3.0+dfsg1+~cs24.12.11-1· arm64 · trixieAffected
nvd · node-undici · debian · 13
- [node-llhttp]Affected
Source package: [node-undici]
Details (2)
9.2.1~7.3.0+dfsg1+~cs24.12.11-1· all · trixieAffected
nvd · node-undici · debian · 13
9.2.1~7.3.0+dfsg1+~cs24.12.11-1· all · trixieAffected
nvd · node-undici · debian · 13
- [node-undici]Affected
Details (2)
7.3.0+dfsg1+~cs24.12.11-1· all · trixieAffected
nvd · node-undici · debian · 13
7.3.0+dfsg1+~cs24.12.11-1· all · trixieAffected
nvd · node-undici · debian · 13
[Debian 12 (Bookworm)]
- [node-llhttp]Not affected
Source package: [node-undici]
Details (4)
8.1.0~5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4· all · bookwormNot affected
nvd · node-undici · debian · bookworm
8.1.0~5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4· all · bookwormNot affected
nvd · node-undici · debian · bookworm
8.1.0~5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3· all · bookworm-securityNot affected
nvd · node-undici · debian · bookworm
8.1.0~5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3· all · bookworm-securityNot affected
nvd · node-undici · debian · bookworm
- [node-undici]Not affected
Details (4)
5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4· all · bookwormNot affected
nvd · node-undici · debian · bookworm
5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4· all · bookwormNot affected
nvd · node-undici · debian · bookworm
5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3· all · bookworm-securityNot affected
nvd · node-undici · debian · bookworm
5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3· all · bookworm-securityNot affected
nvd · node-undici · debian · bookworm
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2026_35841.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-9697]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-9697]
- [https://security-tracker.debian.org/tracker/CVE-2026-9697]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9697.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2919.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]