PatchTheCVECVE-2026-27787: Cross-site scripting vulnerability exists in MATCHA SNS 1.3.9 and earlier
CVE-2026-27787 is a medium-severity flaw (CVSS 5.4) affecting matcha sns. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.4 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | Required |
| EPSS exploit chance | 0.2% (top 95%) |
| CISA exploited list | No |
| Weakness | CWE-79 |
| Published | 2026-04-08 |
| Last modified | 2026-07-25 |
Last updated 2026-07-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-27787?
matcha sns: upgrade to newer than 1.3.9. Exact commands for each OS are on this page.
Is CVE-2026-27787 being exploited?
CVE-2026-27787 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-27787 affect?
CVE-2026-27787 affects matcha sns. Severity is medium (CVSS 5.4). 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.
How urgent is CVE-2026-27787?
Priority 20/100. No elevated risk signals yet.