CVE-2026-28780Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 9.8 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-122, CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Sep 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
apache http_server apache:http_server | before 2.4.67 | NVD |
References
- https://httpd.apache.org/security/vulnerabilities_24.htmlrelease-notes, vendor-advisory
- http://www.openwall.com/lists/oss-security/2026/05/05/9mailing-list, third-party-advisory
- https://access.redhat.com/errata/RHSA-2026:21391
- https://access.redhat.com/errata/RHSA-2026:21433
- https://access.redhat.com/errata/RHSA-2026:22140
- https://access.redhat.com/errata/RHSA-2026:27200
- https://access.redhat.com/errata/RHSA-2026:27201
- https://access.redhat.com/errata/RHSA-2026:36373
- https://access.redhat.com/errata/RHSA-2026:36831
- https://access.redhat.com/errata/RHSA-2026:36846
- https://access.redhat.com/errata/RHSA-2026:47046
- https://access.redhat.com/errata/RHSA-2026:62165
- https://access.redhat.com/errata/RHSA-2026:66323
- https://access.redhat.com/errata/RHSA-2026:67152
- https://access.redhat.com/security/cve/CVE-2026-28780
- https://bugzilla.redhat.com/show_bug.cgi?id=2466913
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-28780.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.