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CVE-2026-94545

Satori-generated SVG has improper escaping

MEDIUM
5.3
CVSS Score
Published: September 30, 2026 at 02:53 PM UTC
Updated: September 30, 2026 at 07:57 PM UTC
2 products affected across 1 vendorNext.jsSatori

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Severity
MEDIUM5.3
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

Satori is a library to convert HTML and CSS to SVG. Starting in version 0.0.27 and prior to version 0.33.5, Satori does not properly escape certain values before including them in generated SVG output. This can allow crafted values to be interpreted as SVG markup. The impact depends on how the generated SVG is consumed. Version 0.33.5 contains a patch. No complete workaround exists besides upgrading. Applications that cannot immediately upgrade should not render attacker-controlled content with Satori.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Next.js· Vercelnpm
60%
v < 16.3.6
Affected range stops below 16.3.6, so it looks safe — our inference, not a vendor statement
Satori· Vercel
60%
v < 0.33.5
Affected range stops below 0.33.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

x_refsource_CONFIRM
Source: cverecord
https://github.com/vercel/satori/security/advisories/GHSA-wx4j-mvgx-mqwp
x_refsource_MISC
Source: cverecord
https://github.com/vercel/next.js/security/advisories/GHSA-vcvr-r3jv-pc5j
x_refsource_MISC
Source: cverecord
https://github.com/vercel/satori/pull/814
x_refsource_MISC
Source: cverecord
https://github.com/vercel/next.js/commit/868fad38690d72088868f299fa2bef339b26838e
x_refsource_MISC
Source: cverecord
https://github.com/vercel/satori/commit/26a52affc031216fee5882b6e965c8dbc7ac1782
x_refsource_MISC
Source: cverecord
https://github.com/vercel/next.js/releases/tag/v16.3.6

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMGitHub_M
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-116

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