CVE-1999-0236httpd Vulnerability
ScriptAlias directory in NCSA and Apache httpd allowed attackers to read CGI programs.
Published Jan 1, 1997 · Updated Apr 15, 2026
Key Facts
Patch immediately- CVE-1999-0236 is a high-severity vulnerability (CVSS 7.5 v3.1) affecting HTTP Server (Apache), Ncsa Httpd (Illinois), apache2 (chainguard) and 1 more product.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 26% probability of exploitation in the next 30 days.
- Fixed versions are available, including HTTP Server 1.0, apache2 2.4.63-r1, httpd 2.4.46-2.
- Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
Scores
CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
26%
Higher than 97.9% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
35/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
Description
ScriptAlias directory in NCSA and Apache httpd allowed attackers to read CGI programs.
Affected Products
5 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| HTTP ServerApache | See advisory | 1.0 |
| Ncsa HttpdIllinois | See advisory | n/a |
| apache2chainguard | See advisory | 2.4.63-r1 |
| httpdmariner | See advisory | 2.4.46-2 |
Patched Releases
HTTP Server
1.0
apache2
2.4.63-r1
httpd
2.4.46-2
Timeline
Publicly disclosed
Jan 1, 1997
Last updated
Apr 15, 2026
References
- advisoryexchange.xforce.ibmcloud.com · CVE-1999-0236
- exploitExploitDB-20595
FAQ
Common Questions.
ScriptAlias directory in NCSA and Apache httpd allowed attackers to read CGI programs.
Affected: HTTP Server (Apache); Ncsa Httpd (Illinois); apache2 (chainguard), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including HTTP Server 1.0, apache2 2.4.63-r1, httpd 2.4.46-2.
Brandefense priority: patch immediately, because public exploit code exists for a high-severity flaw.
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