Satori-generated SVG has improper escaping (vercel satori)
At a glance
- Source
- NVD
- EPSS
- EPSS 1.08 % · percentile 65 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Deferred
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.
Weaknesses (CWE)
- CWE-116 — Improper Encoding or Escaping of Output
References
- https://github.com/vercel/satori/security/advisories/GHSA-wx4j-mvgx-mqwp
- https://github.com/vercel/next.js/security/advisories/GHSA-vcvr-r3jv-pc5j
- https://github.com/vercel/satori/pull/814
- https://github.com/vercel/next.js/commit/868fad38690d72088868f299fa2bef339b26838e
- https://github.com/vercel/satori/commit/26a52affc031216fee5882b6e965c8dbc7ac1782
- https://github.com/vercel/next.js/releases/tag/v16.3.6
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 4.0 | MEDIUM 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 | GitHub_M |
| CVSS 4.0 | MEDIUM 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD · security-advisories@github.com (Secondary) |
Advisories
- GHSA-wx4j-mvgx-mqwp — Satori-generated SVG has improper escaping
European references
- ENISA EUVD · EUVD-2026-89994
- GCVE · GCVE-0-2026-94545
Affected products
| Product | Versions |
|---|---|
| vercel · satori | affected >= 0.0.27, < 0.33.5 |
| vercel · next | affected >= 16.2.0, < 16.3.6 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |