CVE-2026-31827: Blue-B Alienbin, състезание за ресурс

Описание

Оригинално описание

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.

Засегнати продукти

• Blue-B Alienbin: <= 1.0.0

Вид слабост

• CWE-362 Неправилна синхронизация при споделен ресурс (Race Condition)

История

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-31827
• https://nvd.nist.gov/vuln/detail/CVE-2026-31827
• https://github.com/Blue-B/Alienbin/security/advisories/GHSA-hqvr-6v89-gwff