CRITICAL 9.4 Microsoft
CVE-2026-44631
Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow
Microsoft Security Update 2026-Jun: Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow
Affected Products
- azl3 httpd 2.4.67-1 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44631
- https://nvd.nist.gov/vuln/detail/CVE-2026-44631
This critical severity vulnerability with a CVSS score of 9.4 was published on 2026-06-09 via Microsoft. Affected: azl3 httpd 2.4.67-1 on Azure Linux 3.0.
Risk Timeline
CVE Disclosed2026-06-09 · 55 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-44631NVD / MITRE
nvd.nist.gov/vuln/detail/CVE-2026-44631Related Vulnerabilities
| CVE | Title | Severity | CVSS |
|---|---|---|---|
| CVE-2026-40175 | Axios has Unrestricted Cloud Metadata Exfiltration via Header Injection Chain | CRITICAL | 10.0 |
| CVE-2026-42960 | Possible cache poisoning via promiscuous records for the authority section | CRITICAL | 10.0 |
| CVE-2026-46595 | Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x | CRITICAL | 10.0 |
| CVE-2026-39821 | Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/ne | CRITICAL | 10.0 |
| CVE-2024-24576 PoC | Rusts's `std::process::Command` did not properly escape arguments of batch files | CRITICAL | 10.0 |
| CVE-2026-7374 | Kubevirt: kubevirt virt-handler: privilege escalation and node compromise via sy | CRITICAL | 9.9 |
vulnfeed aggregates 9214 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.