---
title: "CVE-2026-94545: Satori-generated SVG has improper escaping"
url: https://erroneo.us/security/cve/CVE-2026-94545/
description: "CVE-2026-94545 (vercel satori): 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…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-30
date_modified: 2026-09-30
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-94545"
kev: false
cvss: 5.3
epss: 0.01038
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-94545: Satori-generated SVG has improper escaping

**Signal:** Normal patch cycle. No exploitation signal; fix it in your next routine update if you are affected. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 1.0% , percentile 64: FIRST’s model estimates a 1.0% chance of exploitation activity in the next 30 days, higher than 64% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Editorial verdict: Patch this week. Next.js: Windows, AVIF and next/og RCEs (Aug-Sep 2026) — Self-hosted Next.js apps still below 15.5.24 or 16.3.3 should upgrade now, ideally straight to the October releases; Windows hosts and apps optimizing untrusted AVIF images are the urgent cases.

## What it is

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 products (CVE record)

- vercel satori: >= 0.0.27, < 0.33.5
- vercel next: >= 16.2.0, < 16.3.6

## Severity

- GitHub_M CVSS 4.0: 5.3 `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 1.04% probability of exploitation activity in the next 30 days; percentile 64.

## Sources

- [CVE.org record CVE-2026-94545](https://www.cve.org/CVERecord?id=CVE-2026-94545)
- [NVD entry CVE-2026-94545](https://nvd.nist.gov/vuln/detail/CVE-2026-94545)
- [github.com](https://github.com/vercel/satori/security/advisories/GHSA-wx4j-mvgx-mqwp)
- [github.com](https://github.com/vercel/next.js/security/advisories/GHSA-vcvr-r3jv-pc5j)
- [github.com](https://github.com/vercel/satori/pull/814)
- [github.com](https://github.com/vercel/next.js/commit/868fad38690d72088868f299fa2bef339b26838e)
- [github.com](https://github.com/vercel/satori/commit/26a52affc031216fee5882b6e965c8dbc7ac1782)
- [github.com](https://github.com/vercel/next.js/releases/tag/v16.3.6)

---
Source page: https://erroneo.us/security/cve/CVE-2026-94545/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt