CVE-2026-94545: Improper Encoding

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.

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Weakness Type (CWE)

CWE-116 CWE-116

References

Other References

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

Frequently Asked Questions

What is CVE-2026-94545? +

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.

How do I check if I'm vulnerable to CVE-2026-94545? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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