CVE catalog
CVE-2026-25896
fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. From 4.1.3to before 5.3.5, a dot (.) in a DOCTYPE entit
- Severity
- Critical · CVSS 9.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.53% · Oct 25, 2026
fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. From 4.1.3to before 5.3.5, a dot (.) in a DOCTYPE entity name is treated as a regex wildcard during entity replacement, allowing an attacker to shadow built-in XML entities (<, >, &, ", ') with arbitrary values. This bypasses entity encoding and leads to XSS when parsed output is rendered. This vulnerability is fixed in 5.3.5.
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-webfont | sid | 11.4.0+dfsg2+~cs35.7.26-22 | vulnerable |
| Debian | node-webfont | forky | 11.4.0+dfsg2+~cs35.7.26-22 | vulnerable |
| Debian | node-webfont | trixie | 11.4.0+dfsg2+~cs35.7.26-13 | vulnerable |
| Debian | node-webfont | bookworm | 11.4.0+dfsg2+~cs35.7.26-7 | vulnerable |
| Npm | fast-xml-parser | Not reported | 5.3.5 | fixed |
| Cpe | node-webfont | Not reported | Not reported | vulnerable |
| Cpe | fast-xml-parser | Not reported | 5.3.5 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | node-webfont | source | sid | (unfixed) | not yet assigned | Not reported | [1147730] |
| Debian | node-webfont | source | forky | (unfixed) | not yet assigned | Not reported | [1147730] |
| Debian | node-webfont | source | trixie | (unfixed) | not yet assigned | Not reported | [1147730] |
| Debian | node-webfont | source | bookworm | (unfixed) | not yet assigned | Not reported | [1147730] |
| Npm | fast-xml-parser | npm | Not reported | 5.3.5 | Not reported | Not reported | Not reported |
| Cpe | fast-xml-parser | cpe | Not reported | 5.3.5 | Not reported | NVD-CVE-2026-25896 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [node-webfont]Affected
Details (2)
11.4.0+dfsg2+~cs35.7.26-7· all · bookwormAffected
nvd · node-webfont · debian · bookworm; nvd · node-webfont · debian · 12
11.4.0+dfsg2+~cs35.7.26-7· all · bookwormAffected
nvd · node-webfont · debian · bookworm; nvd · node-webfont · debian · 12
[Debian 13 (Trixie)]
- [node-webfont]Affected
Details (2)
11.4.0+dfsg2+~cs35.7.26-13· all · trixieAffected
nvd · node-webfont · debian · 13
11.4.0+dfsg2+~cs35.7.26-13· all · trixieAffected
nvd · node-webfont · debian · 13
Observed:
References
- [https://github.com/advisories/GHSA-m7jm-9gc2-mpf2]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-25896]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-25896]
- [https://security-tracker.debian.org/tracker/CVE-2026-25896]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25896.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0772.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]