CVE-2026-94621AliasVault: Server-Side Request Forgery via DNS rebinding in Favicon Extraction

Official description

AliasVault is a privacy-first password manager with built-in email aliasing. Prior to 0.30.3, the AliasVault server API favicon extractor validates a user-supplied hostname with a first DNS lookup but allows the HTTP client to perform a second DNS lookup when connecting. An authenticated low-privileged user operating an attacker-controlled authoritative DNS server can return a public address during validation and a private address during connection, causing a publicly reachable self-hosted server to issue HTTP or HTTPS requests to internal hosts. A valid image response is returned in Base64 form, while other responses can expose limited timing and error information for internal-network reconnaissance. Exploitation requires a publicly reachable self-hosted instance with public registration enabled, an authenticated AliasVault account, an attacker-controlled authoritative DNS server, and a resolver that permits rebinding; default checks limit requests to ports 80 and 443. The browser extensions, web application, and mobile applications are not affected. This issue is fixed in version 0.30.3.

Affected products (as reported)

References

• https://github.com/aliasvault/aliasvault/security/advisories/GHSA-7hm6-fj4m-pf6f x_refsource_CONFIRM
• https://github.com/aliasvault/aliasvault/pull/2311 x_refsource_MISC
• https://github.com/aliasvault/aliasvault/commit/7eb4fee71f4582cfc80b8daea421b99d6aa9f814 x_refsource_MISC
• https://github.com/aliasvault/aliasvault/commit/90ea7d6bb4c74ca169ee1dde3ca38b08bd0966ed x_refsource_MISC
• https://github.com/aliasvault/aliasvault/releases/tag/0.30.3 x_refsource_MISC