How severe is CVE-2026-40168?

CVE-2026-40168 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability low.

Is CVE-2026-40168 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-40168?

CVE-2026-40168 affects Gitroom Postiz. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-40168?

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-2026-40168 have an EU (EUVD) identifier?

Yes. CVE-2026-40168 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21571.

When was CVE-2026-40168 published?

CVE-2026-40168 was published on 2026-04-10 and last updated on 2026-06-17.

CVE-2026-40168

CVE-2026-40168 is a high-severity vulnerability in Gitroom Postiz with a CVSS 3.x base score of 8.2. 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 8.2)
EPSS exploit prediction: 0% (29th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-21571
Weakness: CWE-918
Affected product: Gitroom Postiz
Published: 2026-04-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-40168?: 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.
How severe is CVE-2026-40168?: CVE-2026-40168 has a CVSS 3.x base score of 8.2, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability low.
Is CVE-2026-40168 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (29th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-40168?: CVE-2026-40168 affects Gitroom Postiz. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-40168?: 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-2026-40168 have an EU (EUVD) identifier?: Yes. CVE-2026-40168 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-21571.
When was CVE-2026-40168 published?: CVE-2026-40168 was published on 2026-04-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gitroom:postiz:*:*:*:*:*:*:*:*

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