SSRF via redirect handling in Postiz /api/public/stream
CVE-2026-40168 is a server-side request forgery vulnerability in Postiz, an AI social media scheduling tool, affecting versions prior to 2.21.5. The flaw is in the /api/public/stream endpoint. Postiz validates the initially supplied URL and blocks direct access to private or internal hosts, but it does not re-validate the final destination after following HTTP redirects. An attacker can therefore provide a public HTTPS URL that passes the initial validation and causes the server to follow a redirect to an internal resource, resulting in SSRF against internal network targets or other non-publicly reachable resources.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.