CVE-2026-35516: LinkAce has SSRF via CheckLinksCommand - Link URL Update Bypasses laravel-html-meta Protection

Severity: medium (CVSS 5.0 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: yes
Published: 2026-04-07 · updated 2026-10-26
Weakness: CWE-918

Description

LinkAce is a self-hosted archive to collect website links. Prior to 2.5.4, LinkRepository::update and CheckLinksCommand::checkLink do not check for private IPs. An authenticated user can read responses from internal services (AWS IMDSv1, cloud metadata, internal APIs) by creating a link with a public URL and then updating it to a private IP. The links:check cron job makes the request server-side without IP filtering. This can expose cloud credentials, internal service data, and network topology. This vulnerability is fixed in 2.5.4.

Affected products

Kovah LinkAce: before 2.5.4 — fixed in 2.5.4

How to fix

Upgrade to a fixed version: Kovah LinkAce 2.5.4. Check the vendor advisory for mitigations.

References

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