CVE•Published 2026-05-05•Modified 2026-05-06•1 article on news•6 live references•NVD data
CVE-2026-28780Apache · Http_server
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
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Weaknesses (CWE)
Description
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.
Timeline
Published 2026-05-05
Modified 2026-05-06
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag5,186,994 hosts
vuln:CVE-2026-28780Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Apache Http Server"All exposed Apache Http Server instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Http Server"HTTP body or banner mentions "Http Server" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-28780Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-28780Censys host search filtered to this CVE id.
grep.app
CVE-2026-28780Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-28780GitHub code search for direct mentions.
Google dork
"CVE-2026-28780" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.