PT-2026-24481 · Alienbin · Alienbin

Blue-B · Published 2026-03-10 · Updated 2026-03-10 · CVE-2026-31827

Positive Technologies (AI Summary)

CVSS v4.0

7.1

High

Base vector

AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions Alienbin versions 1.0.0 and earlier

Description Alienbin is an anonymous code and text sharing web service. The /save API endpoint in the server.js file recreates the MongoDB TTL index on the entire post collection with each new paste submission. Submitting a paste with a short TTL value, such as 30 seconds, causes all pastes, including those with longer TTLs (e.g., 7 days), to be deleted after 30 seconds. An attacker can intentionally delete all existing pastes by repeatedly submitting pastes with ttlOption=30s.

Recommendations Update to a newer version that contains a fix for this vulnerability. As a temporary workaround, consider restricting access to the /save endpoint until a patch is available.

Fix

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2026-31827

Affected Products

Alienbin

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-31827 · Security Note
• https://github.com/Blue-B/Alienbin/security/advisories/GHSA-hqvr-6v89-gwff · Note
• https://twitter.com/CVEnew/status/2031504072415584695 · Twitter Post