CVE-2026-47160: Vaultwarden: Server-side request forgery (SSRF) via Icon Endpoint Decimal/Hex/Octal IP Bypass

Severity: medium (CVSS 5.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-15 · updated 2026-10-24
Weakness: CWE-918

Description

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.36.0, Vaultwarden's /icons/{domain}/icon.png endpoint used src/http_client.rs checks including should_block_address() and post_resolve() that missed decimal, hexadecimal, and octal IP representations, allowing SSRF through the icon-fetching HTTP client for blind internal network or port discovery. This issue is fixed in version 1.36.0.

Affected products

dani-garcia vaultwarden: before 1.36.0

References

https://github.com/dani-garcia/vaultwarden/commit/a354e57659d26149fde0d91b76f83fce94e8f277
https://github.com/dani-garcia/vaultwarden/pull/7162
https://github.com/dani-garcia/vaultwarden/releases/tag/1.36.0
https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-72vh-x5jq-m82g
https://github.com/dani-garcia/vaultwarden/security/advisories/GHSA-72vh-x5jq-m82g

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