CVE-2026-43003
CVE-2026-43003 is a high-severity vulnerability in Openstack Ironic Python Agent with a CVSS 3.x base score of 8.0. 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-829.
Key facts
- Severity: High (CVSS 3.x base score 8.0)
- EPSS exploit prediction: 1% (53rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-26489
- Weakness: CWE-829
- Affected product: Openstack Ironic Python Agent
- Published:
- Last modified:
Description
An issue was discovered in OpenStack ironic-python-agent 1.0.0 through 11.5.0. Ironic Python Agent (IPA) sometimes executes grub-install from within a chroot of the deployed partition image, leading to code execution in the case of a malicious image.
Frequently asked questions
- What is CVE-2026-43003?
- An issue was discovered in OpenStack ironic-python-agent 1.0.0 through 11.5.0. Ironic Python Agent (IPA) sometimes executes grub-install from within a chroot of the deployed partition image, leading to code execution in the case of a malicious image.
- How severe is CVE-2026-43003?
- CVE-2026-43003 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-43003 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-43003?
- CVE-2026-43003 affects Openstack Ironic Python Agent. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-43003?
- 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-2026-43003 have an EU (EUVD) identifier?
- Yes. CVE-2026-43003 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26489.
- When was CVE-2026-43003 published?
- CVE-2026-43003 was published on 2026-05-01 and last updated on 2026-06-30.
References
- https://bugs.launchpad.net/ironic-python-agent/+bug/2148310
- https://github.com/openstack/ironic-python-agent/blob/236b33abffe6688afc39c21e351cc3889b3db2dd/ironic_python_agent/efi_utils.py#L134-L139
- http://www.openwall.com/lists/oss-security/2026/06/16/11
- https://access.redhat.com/security/cve/CVE-2026-43003
- https://bugzilla.redhat.com/show_bug.cgi?id=2464306
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43003.json
Affected products (1)
- cpe:2.3:a:openstack:ironic_python_agent:*:*:*:*:*:*:*:*
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