CVE-2026-15809
CVE-2026-15809 is covered by the Red Hat CVE-2026-15809 security bulletin. Not in the CISA KEV catalog. High advisory severity. 1 advisory from Red Hat.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
CVE-2026-15809 key facts
- CISA KEV
- Not listed (catalog checked )
- Highest advisory severity
- High
- Vendor advisories
- 1 from Red Hat
- VulniPulse record
- Published · Updated
Is CVE-2026-15809 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-15809 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-15809?
This CVE is tracked through a multi-CVE bulletin, so its fixed releases may differ from the bulletin-wide values below. Check the vendor source.
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Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.8
High [CVE-2022-4318 +1] Fix Bypass for CVE-2022-4318 — /etc/passwd Injection via HOME env
CVE-2026-15809Source published Source updated
This bulletin covers 2 CVEs. The products, versions, score and guidance below describe the bulletin; check its source for applicability to this specific CVE.
A flaw was found in CRI-O. The fix for a previous vulnerability (CVE-2022-4318) was incorrect, allowing it to be bypassed. An attacker capable of setting environment variables on a container can inject a newline character into the HOME environment variable. This issue allows the addition of arbitrary lines into /etc/passwd by use of a specially crafted environment variable. This Important flaw in CRI-O allows for arbitrary line injection into a container's `/etc/passwd` file. This risk is present in environments where untrusted users can influence container environment variable settings. Red Hat severity: Important — CVSS 7.8 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-134. Affected Red Hat products: Red Hat OpenShift Container Platform 4.12; Red Hat OpenShift Container…
- Affected products in this advisory
- Red Hat OpenShift Container Platform 4.12
- Red Hat OpenShift Container Platform 4.13
- Red Hat OpenShift Container Platform 4.14
- Red Hat OpenShift Container Platform 4.15
8 more entries in the full advisory.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- cri-o-0:1.25.5-36.rhaos4.12.git2e7f657.el8
- cri-o-0:1.26.5-32.rhaos4.13.git1088e36.el8
- cri-o-0:1.27.8-22.rhaos4.14.git0633bf1.el8
- cri-o-0:1.28.11-17.rhaos4.15.git48e6ddb.el8
18 more entries in the full advisory.
- Mitigation guidance
- Restrict access to users who can create or modify container workloads through appropriate RBAC permissions, apply security controls such as Security Context Constraints (SCCs) to limit privilege escalation, and enforce policies to run containers with reduced privileges (for example, as non-root) to reduce the impact of potential exploitation. Enable SELinux on affected nodes and consider admission controls to prevent potentially unsafe workload configurations.
More Red Hat advisories
- CVE-2026-46300May 13, 2026"Fragnesia" is a variant of Dirty Frag vulnerability in the ESP/XFRM leading to Local
- CVE-2026-31431Apr 22, 2026algif_aead - Revert to operating out-of-place
- CVE-2026-119977Oct 31, 2026Arbitrary code execution via predictable upgrade staging paths
- CVE-2026-111497Oct 22, 2026Out-of-Bounds Write in Google Brotli Decoder
- CVE-2026-109619Oct 21, 2026fatal error handling retains stale request state leading to use-after-free
- CVE-2026-109618Oct 21, 2026OOM bailout during request parsing leads to memory corruption and RCE
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