CVE-2026-33640 identifies a critical vulnerability in Outline versions 0.86.0 through 1.5.x, where a rate limit bypass allows for unrestricted brute-force attacks on email One-Time Passwords (OTPs). This flaw, rated 9.8 CRITICAL (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), enables unauthenticated attackers to achieve account takeover with low attack complexity. Although severe, there is currently no evidence of active exploitation, nor are public exploit codes or significant community discussion available.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 0.86.0, < 1.6.0CPE matchmatch criteria | cpe:2.3:a:getoutline:outline:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/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
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.