CVE catalog
CVE-2026-14643
undici's cache interceptor mishandles optional whitespace placed around the equals sign of a qualified no-cache or private Cache-Control directive. In undici from 7.0.0 up to before 7.29.0 and from 8.
- Severity
- Medium · CVSS 5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.40% · Oct 25, 2026
undici's cache interceptor mishandles optional whitespace placed around the equals sign of a qualified no-cache or private Cache-Control directive. In undici from 7.0.0 up to before 7.29.0 and from 8.0.0 up to before 8.9.0, the parser either drops the directive or stores a field name with literal quote characters, so the cache decision fails to recognize the qualification and the response is stored. In shared-cache mode, this lets a response containing one user's authenticated data be served from cache to a later caller, including an unauthenticated one, when both requests resolve to the same cache key. It affects applications that enable the cache interceptor in shared mode, forward Authorization headers upstream, and receive cacheable responses with qualified directives padded with whitespace around the equals sign. This is the whitespace-around-equals variant that the fix for CVE-2026-9678 did not normalize, and it is fixed in undici 7.29.0 and 8.9.0.
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 | vulnerable |
| Debian | node-undici | bookworm-security | 5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3 | vulnerable |
| Npm | undici | Not reported | 8.9.0 | fixed |
| Npm | undici | Not reported | 8.9.0 | fixed |
| Npm | undici | Not reported | 7.29.0 | fixed |
| Npm | undici | Not reported | 8.9.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | node-undici | source | sid | 8.9.0+dfsg+~cs3.2.0-1 | not yet assigned | Not reported | Not reported |
| Debian | node-undici | source | forky | 8.9.0+dfsg+~cs3.2.0-1 | not yet assigned | Not reported | Not reported |
| Debian | node-undici | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | node-undici | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
| Npm | undici | npm | Not reported | 8.9.0 | Not reported | GHSA-JR45-8VMC-QM54 | Not reported |
| Npm | undici | npm | Not reported | 8.9.0 | Not reported | Not reported | Not reported |
| Npm | undici | npm | Not reported | 7.29.0 | Not reported | Not reported | Not reported |
| Npm | undici | npm | Not reported | 8.9.0 | Not reported | Not reported | Not reported |
Notes
[trixie] node-undici: Minor issue [bookworm] node-undici: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [node-llhttp]Affected
Source package: [node-undici]
Details (4)
8.1.0~5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4· all · bookwormAffected
nvd · node-undici · debian · bookworm; nvd · node-undici · debian · 12
8.1.0~5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4· all · bookwormAffected
nvd · node-undici · debian · bookworm; nvd · node-undici · debian · 12
8.1.0~5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3· all · bookworm-securityAffected
nvd · node-undici · debian · bookworm; nvd · node-undici · debian · 12
8.1.0~5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3· all · bookworm-securityAffected
nvd · node-undici · debian · bookworm; nvd · node-undici · debian · 12
- [node-undici]Affected
Details (4)
5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4· all · bookwormAffected
nvd · node-undici · debian · bookworm; nvd · node-undici · debian · 12
5.15.0+dfsg1+~cs20.10.9.3-1+deb12u4· all · bookwormAffected
nvd · node-undici · debian · bookworm; nvd · node-undici · debian · 12
5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3· all · bookworm-securityAffected
nvd · node-undici · debian · bookworm; nvd · node-undici · debian · 12
5.15.0+dfsg1+~cs20.10.9.3-1+deb12u3· all · bookworm-securityAffected
nvd · node-undici · debian · bookworm; nvd · node-undici · debian · 12
[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
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-14643]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-14643]
- [https://osv.dev/vulnerability/GHSA-jr45-8vmc-qm54]
- [https://security-tracker.debian.org/tracker/CVE-2026-14643]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-14643.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3621.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]