Medium severity · published Oct 2, 2026
CVE-2026-104439
YesWiki before 4.6.7 User Enumeration via Lost-Password Flow
5.3
CVSS
0.3%
EPSS
No
On KEV
Description
YesWiki before 4.6.7 contains a user enumeration vulnerability in LostPasswordAction.php that allows unauthenticated attackers to confirm registered email addresses through differing responses. Attackers can submit emails to the MotDePassePerdu recovery page without rate limiting to identify valid accounts for targeted phishing or password-spraying.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
YE
yeswiki · YesWiki
before 4.6.7 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-104439
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-104439
vendor-advisory
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-892r-45m6-45xc
third-party-advisory
https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-user-enumeration-via-lost-password-flow
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