{"apiVersion":"1.0","identifier":"CVE-2026-73431","description":"Vulnerability-Lookup contains an authentication weakness in its account activation and password-recovery mechanism. Activation and recovery links were generated using stateless signed tokens containing only the user-s login. Although the token signature and age were validated, the application did not track whether a token had already been successfully used. As a result, a captured activation or password-recovery link remained valid for the entire configured TOKEN_VALIDITY_PERIOD, even after the associated password had been changed. An attacker who obtains a valid activation or recovery token could therefore replay it multiple times during its validity period to set a new password and repeatedly take control of the affected account. In addition, tokens were not bound to a specific purpose, allowing the same token mechanism to be used across activation and recovery workflows. The patch introduces purpose-bound tokens and a random nonce whose SHA-256 digest is stored with the user account. The nonce is invalidated after a successful password change, making tokens single-use, while issuing a new token invalidates any previously issued token. The password-setting operation now explicitly consumes the token before committing the account change. Successful exploitation requires the attacker to obtain a currently valid activation or recovery link, but does not require knowledge of the victim-s existing password or an authenticated session.","publishedAt":"2026-08-12T15:18:33","lastModifiedAt":"2026-08-26T16:49:18","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73431","cvssScore":8.8,"cvssVector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/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","epssProbability":0.00279,"riskScore":0.9,"affectedProduct":"Vulnerability-Lookup","affectedVersions":"unknown","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-73431","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-73431","en":"https://www.redsauce.net/en/cves/CVE-2026-73431","fr":"https://www.redsauce.net/fr/cves/CVE-2026-73431","pt":"https://www.redsauce.net/pt/cves/CVE-2026-73431","de":"https://www.redsauce.net/de/cves/CVE-2026-73431","sk":"https://www.redsauce.net/sk/cves/CVE-2026-73431","el":"https://www.redsauce.net/el/cves/CVE-2026-73431"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-73431"}}