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CVE

CVE-2026-29112

Uncontrolled memory allocation via crafted SVG dimensions in @dicebear/converter
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CVE

CVE-2026-29112

Uncontrolled memory allocation via crafted SVG dimensions in @dicebear/converter

Impact

The ensureSize() function in @dicebear/converter (versions < 9.4.0) read the width and height attributes from the input SVG to determine the output canvas size for rasterization (PNG, JPEG, WebP, AVIF). An attacker who can supply a crafted SVG with extremely large dimensions (e.g. width="999999999") could force the server to allocate excessive memory, leading to denial of service.

This primarily affects server-side applications that pass untrusted or user-supplied SVGs to the converter's toPng(), toJpeg(), toWebp(), or toAvif() functions. Applications that only convert self-generated DiceBear avatars are not practically exploitable, but are still recommended to upgrade.

Patches

Fixed in version 9.4.0. The ensureSize() function no longer reads SVG attributes to determine output size. Instead, a new size option (default: 512, max: 2048) controls the output dimensions. Invalid values (NaN, negative, zero, Infinity) fall back to the default.

Workarounds

If upgrading is not immediately possible, validate and sanitize the width and height attributes of any untrusted SVG input before passing it to the converter.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Related Resources

No items found.

References

https://github.com/dicebear/dicebear/security/advisories/GHSA-v3r3-4qgc-vw66, https://nvd.nist.gov/vuln/detail/CVE-2026-29112, https://github.com/dicebear/dicebear/commit/42a59eac46a3c68598859e608ec45e578b27614a, https://github.com/dicebear/dicebear, https://github.com/dicebear/dicebear/releases/tag/v9.4.0

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0.0006%
EPSS Percentile
0.18756%
Introduced Version
0,5.0.0-alpha.20
Fix Available
9.4.0

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