Server-side request forgery in AliasVault favicon extraction
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.
Summary
AliasVault versions before 0.30.3 check a user-supplied hostname with one DNS lookup, then the HTTP client resolves it again when connecting. An authenticated low-privileged user with an attacker-controlled DNS server can make a publicly reachable self-hosted server send requests to internal hosts (CWE-918). Valid images are returned in Base64, and other responses can leak limited timing and error details.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
Description from the CNA
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| aliasvault | aliasvault | before 0.30.3 | 0.30.3 | Patch available | CNA |
| aliasvault | ghcr.io/aliasvault/aliasvault | before 0.30.3 | 0.30.3 | Patch available | CNA |
| aliasvault | ghcr.io/aliasvault/api | before 0.30.3 | 0.30.3 | Patch available | CNA |
| aliasvault | ghcr.io/lanedirt/aliasvault-api | before 0.30.3 | 0.30.3 | Patch available | CNA |
- aliasvault Vendoraliasvault Affected before 0.30.3 Fixed in 0.30.3 Patch available CNA
- ghcr.io/aliasvault/aliasvault Vendoraliasvault Affected before 0.30.3 Fixed in 0.30.3 Patch available CNA
- ghcr.io/aliasvault/api Vendoraliasvault Affected before 0.30.3 Fixed in 0.30.3 Patch available CNA
- ghcr.io/lanedirt/aliasvault-api Vendoraliasvault Affected before 0.30.3 Fixed in 0.30.3 Patch available CNA
Remediation
Update AliasVault to version 0.30.3, which fixes this issue.
Written with Claude Haiku 5.5 from the sources below · 2026-10-28
- Fix · CNA aliasvault (aliasvault) Fixed in 0.30.3
- Fix · CNA ghcr.io/aliasvault/aliasvault (aliasvault) Fixed in 0.30.3
- Fix · CNA ghcr.io/aliasvault/api (aliasvault) Fixed in 0.30.3
- Fix · CNA ghcr.io/lanedirt/aliasvault-api (aliasvault) Fixed in 0.30.3
Timeline
- 2026-10-16 Threatist record created from CVE-2026-94621
- 2026-10-16 Priority changed: MEDIUM → LOW
- 2026-10-16 CISA SSVC decision points changed
References
Other 5
- https://github.com/aliasvault/aliasvault/security/advisories/GHSA-7hm6-fj4m-pf6f
- https://github.com/aliasvault/aliasvault/pull/2311
- https://github.com/aliasvault/aliasvault/commit/7eb4fee71f4582cfc80b8daea421b99d6aa9f814
- https://github.com/aliasvault/aliasvault/commit/90ea7d6bb4c74ca169ee1dde3ca38b08bd0966ed
- https://github.com/aliasvault/aliasvault/releases/tag/0.30.3
More aliasvault vulnerabilities
- TI-2026-02566 AliasVault App Backup aliasvault.xml backup CVSS 4.0LOW 2.0
- TI-2026-21236 AliasVault affected by Cross-Site Scripting (XSS) via Email HTML Rendering CVSS 3.1CRITICAL 9.3
- TI-2026-74985 AliasVault browser extension passkeys accept forged origin and RP ID CVSS 3.1HIGH 8.1
- TI-2025-36905 AliasVault Vulnerable to Server-Side Request Forgery via Favicon Extraction CVSS 3.1HIGH 7.7
- TI-2026-18221 AliasVault is Missing Origin Validation in Android Passkey Credential Provider CVSS 3.1MEDIUM 6.1
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences