CVE-2026-27858
CVE-2026-27858: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
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.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.5
High [CVE-2026-27858] denial of service via crafted message before authentication
CVE-2026-27858Source published
denial of service via crafted message before authentication. Red Hat rates this important (CVSS 7.5). Weakness: CWE-770. Affected package(s): dovecot. Resolved in Red Hat advisory RHSA-2026:26564 — update the affected packages (`sudo dnf update`).
- Affected products in this advisory
- Red Hat Enterprise Linux 10.0 Extended Update Support
- Red Hat Enterprise Linux 7 Extended Lifecycle Support
- Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
- Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
10 more entries in the full advisory.
- Source-reported affected versions
- dovecot-1:2.2.36-8.el7_9.1
- dovecot-1:2.3.16-8.el9_2.2
- dovecot-1:2.3.16-3.el9_0.1
- dovecot-1:2.3.16-18.el9_8
8 more entries in the full advisory.
- Source-reported fixed versions
- RHSA-2026:26564
- Mitigation guidance
- Update the affected package(s) to the fixed version shipped in RHSA-2026:26564 (`sudo dnf update` / `yum update`).
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