CVE-2026-18544 Portieris is vulnerable to Image Policy Bypass via Unvalidated ownerReference
Authenticated attackers can bypass image policy enforcement in IBM Portieris by exploiting unvalidated pod owner references.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-18544?
CVE-2026-18544 is a high-severity missing authorization vulnerability in IBM Portieris, published on 19 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM Portieris 0.5.0 through 0.14.2 could allow a remote authenticated attacker to bypass image policy enforcement due to improper authorization of pod owner references.
Weakness: CWE-862
Which versions are affected by CVE-2026-18544?
It affects 1 product.
Products include Ibm Portieris.
How do I fix CVE-2026-18544?
No fix has been published for CVE-2026-18544 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-18544 being exploited?
There is no known exploitation of CVE-2026-18544 in the wild and no public exploit code.
Sources
Also known as GHSA-q4gw-3xwf-fpcw.