CVE-2026-3449 describes an Incorrect Control Flow Scoping vulnerability in @tootallnate/once package versions prior to 3.0.1. When an AbortSignal is used, promises can become permanently pending, leading to indefinite hangs for await or .then() calls, which can cause control-flow leaks, stalled requests, and degraded application availability. This vulnerability has a CVSS score of 3.3 (LOW), indicating a local attack vector with low complexity, and its primary impact is on availability. There is no evidence of active exploitation, public exploit code, or significant community discussion beyond a single mention and article.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| N/A | @Tootallnate/Once | >= 0, < 3.0.1CNA affected |
CVSS version used by this source: 4.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.