CVE-2026-79663
Last modified
CVE-2026-79663 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. Ech0 before 4.7.3 contains a stored cross-site scripting vulnerability in the public RSS feed where tag names and markdown content are rendered without HTML escaping. Attackers with admin privileges can inject malicious tag names or raw HTML in echo content that executes as JavaScript in RSS readers that render HTML-type summaries, affecting anonymous subscribers and other users.. EPSS estimates a 0.15% chance of exploitation in the next 30 days.
Description
Ech0 before 4.7.3 contains a stored cross-site scripting vulnerability in the public RSS feed where tag names and markdown content are rendered without HTML escaping. Attackers with admin privileges can inject malicious tag names or raw HTML in echo content that executes as JavaScript in RSS readers that render HTML-type summaries, affecting anonymous subscribers and other users.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| lin-snow | Ech0 | < 4.7.3 |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-79663?
How severe is CVE-2026-79663?
How do I fix CVE-2026-79663?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-79658Ech0 before 5.0.1 does not impose any size or shape limit on…7.5
- CVE-2026-79659Ech0 before 4.7.3 contains a server-side request forgery vul…7.7
- CVE-2026-7966Insufficient validation of untrusted input in SiteIsolation …3.1
- CVE-2026-79660Ech0 versions before 4.7.3 expose guest commenter email addr…5.3
- CVE-2026-79661Ech0 through 4.5.6 registers the PUT /api/echo/like/:id endp…6.5
- CVE-2026-79662Ech0 through 4.5.6 contains an OAuth redirect URI validation…8
- CVE-2026-79664Ech0 before 4.7.3 fails to properly revoke access tokens cre…7.4
- CVE-2026-79665Ech0 before 4.5.1 contains an authorization bypass vulnerabi…8.8
- CVE-2026-79666Ech0 before 4.4.3 fails to enforce administrator authorizati…6.5
- CVE-2026-79667Ech0 version 4.3.4 and earlier fails to reliably enforce sco…7.6
- CVE-2026-79668Ech0 before 4.7.3 contains an authentication bypass vulnerab…5.3
- CVE-2026-79669Ech0 before 4.4.3 lacks authorization checks on system log e…4.3
Are you affected by CVE-2026-79663?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST