How severe is CVE-2026-33953?

CVE-2026-33953 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-33953 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33953?

CVE-2026-33953 affects Linkace. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-33953?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-33953 have an EU (EUVD) identifier?

Yes. CVE-2026-33953 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16868.

When was CVE-2026-33953 published?

CVE-2026-33953 was published on 2026-03-27 and last updated on 2026-06-17.

CVE-2026-33953

CVE-2026-33953 is a high-severity vulnerability in Linkace with a CVSS 3.x base score of 8.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: High (CVSS 3.x base score 8.5)
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16868
Weakness: CWE-918
Affected product: Linkace
Published: 2026-03-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-33953?: 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.
How severe is CVE-2026-33953?: CVE-2026-33953 has a CVSS 3.x base score of 8.5, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-33953 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33953?: CVE-2026-33953 affects Linkace. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-33953?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-33953 have an EU (EUVD) identifier?: Yes. CVE-2026-33953 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16868.
When was CVE-2026-33953 published?: CVE-2026-33953 was published on 2026-03-27 and last updated on 2026-06-17.

References

https://github.com/Kovah/LinkAce/security/advisories/GHSA-wp4g-qw9j-wfjg

Affected products (1)

cpe:2.3:a:linkace:linkace:*:*:*:*:*:*:*:*

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