CVE-2026-21618 describes a Cross-Site Scripting (XSS) vulnerability in hexpm/hexpm, specifically within the 'Elixir.HexpmWeb.SharedAuthorizationView' modules, affecting versions of hexpm from 617e44c71f1dd9043870205f371d375c5c4d886d before c692438684ead90c3bcbfb9ccf4e63c768c668a8, and hex.pm from 2025-10-01 before 2026-01-19. This vulnerability, rated 8.5 HIGH on CVSS 4.0, allows an unauthenticated attacker to execute malicious scripts in a victim's browser with low attack complexity, potentially leading to high impact on confidentiality and integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2025-10-01, < 2026-01-19CPE matchmatch criteria | cpe:2.3:a:hex:hexpm:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/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
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