Vulnerability Description
Alienbin is an anonymous code and text sharing web service. In 1.0.0 and earlier, the /save endpoint in server.js drops and recreates the MongoDB TTL index on the entire post collection for every new paste submission. When User B submits a paste with a short TTL (e.g., 30 seconds), the TTL index is recreated with expireAfterSeconds: 30 for all documents in the collection. This causes User A's paste (originally set to 7 days) to be deleted after 30 seconds. An attacker can intentionally delete all existing pastes by repeatedly submitting pastes with ttlOption=30s.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-31827?
CVE-2026-31827 is a documented vulnerability. Alienbin is an anonymous code and text sharing web service. In 1.0.0 and earlier, the /save endpoint in server.js drops and recreates the MongoDB TTL index on the entire post collection for every new ...
How severe is CVE-2026-31827?
CVSS scoring is not yet available for CVE-2026-31827. Check NVD for updates.
Is there a patch for CVE-2026-31827?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.