DiceBear: SVG injection via the unescaped rotate option in @dicebear/core (and fontSize/fontWeight in @dicebear/initials)
Summary
@dicebear/core builds avatar SVGs from caller-supplied options. The numeric rotate option is interpolated into an SVG transform attribute without XML-escaping. It is typed as a number, but nothing checks the type at runtime, so a string value passes straight through and can break out of the attribute to inject arbitrary SVG markup.
This is the same root cause as CVE-2026-33311 (GHSA-mr9r-mww3-v6gv), which escaped the string options backgroundColor, fontFamily, and textColor but did not cover rotate. @dicebear/initials has the same gap in its numeric fontSize and fontWeight options.
Impact
Cross-site scripting (CWE-79). When the generated avatar is rendered inline (for example via innerHTML) or served as image/svg+xml and opened directly, injected markup such as an <image onerror> handler runs script in the page's origin.
Exploitation requires the application to pass untrusted input into one of these options:
rotate(@dicebear/core)fontSize,fontWeight(@dicebear/initials)
In most integrations these options are set by the developer and only seed is user-controlled, so the vulnerable configuration is uncommon. Applications that use trusted, hardcoded values for these options are not at risk.
Patches
Fixed in @dicebear/core 9.4.3 and @dicebear/initials 9.4.3: the values are now XML-escaped before being written into the SVG, matching the CVE-2026-33311 fix. Upgrade to 9.4.3 or later.
The 5.x through 8.x lines share the same flaw but are end-of-life and will not receive a backport; upgrade to 9.4.3. The 10.x line is not affected.
Workarounds
If you cannot upgrade, coerce the affected options to a number before passing them to createAvatar:
rotate: Number(userInput) || 0,Credits
Reported by @rz1027.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | @dicebear/core | < 9.4.3 | 9.4.3 |
| npm package | @dicebear/initials | < 9.4.3 | 9.4.3 |
References
- https://github.com/dicebear/dicebear/security/advisories/GHSA-gcr2-9v8m-gq45
- https://nvd.nist.gov/vuln/detail/CVE-2026-68921
- https://github.com/dicebear/dicebear/commit/922946d738c4e77ab6c412e27ede75941fec4b59
- https://github.com/dicebear/dicebear
- https://github.com/dicebear/dicebear/releases/tag/v9.4.3
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N- Weakness (CWE)
CWE-184, CWE-79- Platform
- npm
- Package
@dicebear/core, @dicebear/initials- Disclosed
- 02.09.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-gcr2-9v8m-gq45 - CC BY 4.0
Vulnerability history: @dicebear/core
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 03.2026 09.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 2
Disclosures per year
- 2026: 2
-
DiceBear: SVG injection via the unescaped rotate option in @dicebear/core (and fontSize/fontWeight in @dicebear/initials) this entry
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