MediumFix available
apache2 — security advisory
In Apache httpd 2.4.0 to 2.4.29, when mod_session is configured to forward its session data to CGI applications (SessionEnv on, not the default), a remote user may influence their content by using a "Session" header. This comes from the "HTTP_SESSION" variable name used by mod_session to forward its data to CGIs, since the prefix "HTTP_" is also used by the Apache HTTP Server to pass HTTP header fields, per CGI specifications.
- Products
- apache2
- Affected versions
- Not specified
- Fixed versions
- 2.4.33-r0
- CVEs
- CVE-2018-1283
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 21:57 UTC · Revision 1
Source evidence
In Apache httpd 2.4.0 to 2.4.29, when mod_session is configured to forward its session data to CGI applications (SessionEnv on, not the default), a remote user may influence their content by using a "Session" header. This comes from the "HTTP_SESSION" variable name used by mod_session to forward its data to CGIs, since the prefix "HTTP_" is also used by the Apache HTTP Server to pass HTTP header fields, per CGI specifications.
osv:ALPINE-CVE-2018-1283
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
apache2
Fixed versions: 2.4.33-r0
Complete source record
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],
"modified": "2026-10-23T17:17:55.209792524Z",
"provider": "osv",
"upstream": [
"CVE-2018-1283"
],
"references": [
"https://security.alpinelinux.org/vuln/CVE-2018-1283"
]
},
"related_cves": [
{
"value": "CVE-2018-1283",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 415013,
"published_at": "2018-03-26T15:29:00.367+00:00"
}