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CVE-2026-33953

Linkace server-side request forgery (SSRF)

8.5 HIGHPublic exploitEPSS 0.33%
  1. Published27 Mar 2026

Description

LinkAce is a self-hosted archive to collect website links. Versions prior to 2.5.3 block direct requests to private IP literals, but still performs server-side requests to internal-only resources when those resources are referenced through an internal hostname. This allows an authenticated user to trigger server-side requests to internal services reachable by the LinkAce server but not directly reachable by an external user. Version 2.5.3 patches the issue.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Affected products

Linkace< 2.5.3

Remediation

Fixed in
Linkace≥ 2.5.3

References

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Frequently asked

Is CVE-2026-33953 being actively exploited?

CVE-2026-33953 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.33%.

How severe is CVE-2026-33953?

CVE-2026-33953 has a CVSS 3.1 base score of 8.5, rated high. EPSS estimates a 0.33% probability of exploitation.

Which products are affected by CVE-2026-33953?

Affected products include Linkace.

How do I fix CVE-2026-33953?

Upgrade affected software to a fixed version, for example Linkace 2.5.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.