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CVE-2026-40168

Gitroom Postiz server-side request forgery (SSRF)

8.2 HIGHPublic exploitEPSS 0.52%
  1. Published10 Apr 2026

Description

Postiz is an AI social media scheduling tool. Prior to 2.21.5, the /api/public/stream endpoint is vulnerable to SSRF. Although the application validates the initially supplied URL and blocks direct private/internal hosts, it does not re-validate the final destination after HTTP redirects. As a result, an attacker can supply a public HTTPS URL that passes validation and then redirects the server-side request to an internal resource.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

Affected products

Gitroom Postiz< 2.21.5

Remediation

Fixed in
Gitroom Postiz≥ 2.21.5

References

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Frequently asked

Is CVE-2026-40168 being actively exploited?

CVE-2026-40168 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.52%.

How severe is CVE-2026-40168?

CVE-2026-40168 has a CVSS 3.1 base score of 8.2, rated high. EPSS estimates a 0.52% probability of exploitation.

Which products are affected by CVE-2026-40168?

Affected products include Gitroom Postiz.

How do I fix CVE-2026-40168?

Upgrade affected software to a fixed version, for example Gitroom Postiz 2.21.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-40168 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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