Vulnerability intelligence
CVE-2026-28780
Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server. If mod_proxy_ajp connects to a malicious AJP server this AJP server can send a malicious AJP message back to mod_proxy_ajp and cause it to write 4 attacker controlled bytes after the end of a heap based buffer. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.
CVSS Score
—
Unrated
EPSS — Exploit Probability
1.4%
Riskier than 69% of all CVEs
Exploitation
Not in CISA KEV
No federal exploitation record
Remediation
unknown
Check vendor advisories
1 article across 1 outlet · first covered May 5, 2026 · latest May 5, 2026
Coverage timeline
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Apache patches HTTP Server and MINA flaws, warns of RCE riskwww.securityweek.com · May 5, 2026