CVE-2026-28780 (GCVE-0-2026-28780)
Vulnerability from cvelistv5 – Published: 2026-05-05 21:29 – Updated: 2026-05-05 22:24
VLAI?
Title
Apache HTTP Server: buffer overflow in mod_proxy_ajp via ajp_msg_check_header()
Summary
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.
Severity ?
No CVSS data available.
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Apache Software Foundation | Apache HTTP Server |
Affected:
0 , ≤ 2.4.66
(semver)
|
Credits
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2026-05-05T22:24:30.623Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://www.openwall.com/lists/oss-security/2026/05/05/9"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Apache HTTP Server",
"vendor": "Apache Software Foundation",
"versions": [
{
"lessThanOrEqual": "2.4.66",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Andrew Lacambra"
},
{
"lang": "en",
"type": "finder",
"value": "Elhanan Haenel"
},
{
"lang": "en",
"type": "finder",
"value": "Tianshuo Han (\u003chantianshuo233@gmail.com\u003e)"
},
{
"lang": "en",
"type": "finder",
"value": "Tristan Madani"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eHeap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server.\u003cbr\u003eIf 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.\u003c/p\u003e\u003cp\u003eThis issue affects Apache HTTP Server: through 2.4.66.\u003c/p\u003e\u003cp\u003eUsers are recommended to upgrade to version 2.4.67, which fixes the issue.\u003c/p\u003e"
}
],
"value": "Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server.\nIf 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.\n\nThis issue affects Apache HTTP Server: through 2.4.66.\n\nUsers are recommended to upgrade to version 2.4.67, which fixes the issue."
}
],
"metrics": [
{
"other": {
"content": {
"text": "low"
},
"type": "Textual description of severity"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-122",
"description": "CWE-122 Heap-based Buffer Overflow",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-05T21:29:41.527Z",
"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"shortName": "apache"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://httpd.apache.org/security/vulnerabilities_24.html"
}
],
"source": {
"discovery": "UNKNOWN"
},
"timeline": [
{
"lang": "en",
"time": "2026-02-04T12:00:00.000Z",
"value": "reported"
},
{
"lang": "en",
"time": "2026-03-18T12:00:00.000Z",
"value": "reported by 3rd finder"
},
{
"lang": "en",
"time": "2026-02-28T12:00:00.000Z",
"value": "reported by 2nd finder"
}
],
"title": "Apache HTTP Server: buffer overflow in mod_proxy_ajp via ajp_msg_check_header()",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"assignerShortName": "apache",
"cveId": "CVE-2026-28780",
"datePublished": "2026-05-05T21:29:41.527Z",
"dateReserved": "2026-03-03T12:31:23.999Z",
"dateUpdated": "2026-05-05T22:24:30.623Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-28780\",\"sourceIdentifier\":\"security@apache.org\",\"published\":\"2026-05-05T22:16:00.390\",\"lastModified\":\"2026-05-05T23:16:17.830\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server.\\nIf 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.\\n\\nThis issue affects Apache HTTP Server: through 2.4.66.\\n\\nUsers are recommended to upgrade to version 2.4.67, which fixes the issue.\"}],\"metrics\":{},\"weaknesses\":[{\"source\":\"security@apache.org\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-122\"}]}],\"references\":[{\"url\":\"https://httpd.apache.org/security/vulnerabilities_24.html\",\"source\":\"security@apache.org\"},{\"url\":\"http://www.openwall.com/lists/oss-security/2026/05/05/9\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…