BIT-mastodon-2026-50129: Mastodon: Persistent anonymous DoS via unhandled NoMethodError in MATH_TRANSFORMER
Mastodon versions prior to 4.3.24, 4.4.18, and 4.5.11 contain a vulnerability where malformed <math> nodes cause an unhandled NoMethodError exception in the math sanitizer. This results in a persistent denial-of-service (DoS) condition affecting the entire server or specific user services depending on the context of the malformed input. The issue is fixed in versions 4.3.24, 4.4.18, and 4.5.11.
AI Analysis
Technical Summary
Mastodon, an open-source social network server, has a vulnerability identified as CVE-2026-50129 that allows an attacker to cause a denial-of-service via unhandled exceptions triggered by malformed <math> nodes in content processed by the math sanitizer. The lack of exception handling for NoMethodError in the MATH_TRANSFORMER component leads to server or service disruption. This vulnerability affects Mastodon versions prior to 4.3.24, 4.4.18, and 4.5.11 and has been addressed in these fixed versions.
Potential Impact
Successful exploitation causes a denial-of-service condition by crashing or disrupting the Mastodon server or targeted user services due to unhandled exceptions. This can degrade availability of the social network service or specific user interactions involving malformed mathematical content.
Mitigation Recommendations
Upgrade Mastodon to version 4.3.24, 4.4.18, or 4.5.11 or later, where this vulnerability is fixed. No other mitigation is indicated as the issue is resolved by these official patches.
BIT-mastodon-2026-50129: Mastodon: Persistent anonymous DoS via unhandled NoMethodError in MATH_TRANSFORMER
Description
Mastodon versions prior to 4.3.24, 4.4.18, and 4.5.11 contain a vulnerability where malformed <math> nodes cause an unhandled NoMethodError exception in the math sanitizer. This results in a persistent denial-of-service (DoS) condition affecting the entire server or specific user services depending on the context of the malformed input. The issue is fixed in versions 4.3.24, 4.4.18, and 4.5.11.
Affected software
pkg:bitnami/mastodonRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Mastodon, an open-source social network server, has a vulnerability identified as CVE-2026-50129 that allows an attacker to cause a denial-of-service via unhandled exceptions triggered by malformed <math> nodes in content processed by the math sanitizer. The lack of exception handling for NoMethodError in the MATH_TRANSFORMER component leads to server or service disruption. This vulnerability affects Mastodon versions prior to 4.3.24, 4.4.18, and 4.5.11 and has been addressed in these fixed versions.
Potential Impact
Successful exploitation causes a denial-of-service condition by crashing or disrupting the Mastodon server or targeted user services due to unhandled exceptions. This can degrade availability of the social network service or specific user interactions involving malformed mathematical content.
Mitigation Recommendations
Upgrade Mastodon to version 4.3.24, 4.4.18, or 4.5.11 or later, where this vulnerability is fixed. No other mitigation is indicated as the issue is resolved by these official patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-mastodon-2026-50129
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-50129"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- High
- Cvss Version
- null
Threat ID: 6a4c347427e9c79719603a8f
Added to database: 07/06/2026, 23:04:20 UTC
Last enriched: 07/06/2026, 23:36:52 UTC
Last updated: 07/07/2026, 00:47:56 UTC
Views: 3
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