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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-94621
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-15 19:17:49 UTC
Updated2026-10-16 20:04:29 UTC
DescriptionAliasVault 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.

Risk And Classification

Primary CVSS: v3.1 6.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS: 0.001950000 probability, percentile 0.085820000 (date 2026-10-16)

Problem Types: CWE-367 | CWE-918 | CWE-367 CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
3.1CNADECLARED6.3MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Aliasvault Aliasvault affected < 0.30.3 Not specified
CNA Aliasvault Ghcr.io/aliasvault/aliasvault affected < 0.30.3 Not specified
CNA Aliasvault Ghcr.io/aliasvault/api affected < 0.30.3 Not specified
CNA Aliasvault Ghcr.io/lanedirt/aliasvault-api affected < 0.30.3 Not specified

References

ReferenceSourceLinkTags
github.com/aliasvault/aliasvault/releases/tag/0.30.3 [email protected] github.com
github.com/aliasvault/aliasvault/commit/7eb4fee71f4582cfc80b8daea421b99d... [email protected] github.com
github.com/aliasvault/aliasvault/security/advisories/GHSA-7hm6-fj4m-pf6f [email protected] github.com
github.com/aliasvault/aliasvault/commit/90ea7d6bb4c74ca169ee1dde3ca38b08... [email protected] github.com
github.com/aliasvault/aliasvault/pull/2311 [email protected] github.com
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