CPANSA-HTTP-Daemon-2026-8450: HTTP-Daemon vulnerability
| Publisher | giterlizzi | Document category | csaf_security_advisory |
|---|---|---|---|
| Initial release date | 2026-05-27T00:00:00 | Engine | CSAF Perl Toolkit 0.26 |
| Current release date | 2026-05-27T00:00:00 | Build Date | |
| Current version | 1 | Status | final |
| CVSS v3.1 Base Score | 9.1 | Severity | |
| Original language | Language | en | |
| Also referred to | |||
Vulnerability Description
HTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file(). send_file() opens its string argument with Perl's 2-arg open(). The 2-arg form interprets magic prefixes: '| cmd' and 'cmd |' open a pipe to a subprocess, '> path' and '>> path' open the path for write or append. Untrusted input passed to send_file() can run OS commands at the daemon process UID. The read-pipe form ('cmd |') also leaks subprocess stdout into the HTTP response body. The write-mode forms can create or truncate files at attacker chosen paths.
Vulnerabilities
CVE-2026-8450
Vulnerability DescriptionHTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file().
send_file() opens its string argument with Perl's 2-arg open(). The 2-arg form interprets magic prefixes: '| cmd' and 'cmd |' open a pipe to a subprocess, '> path' and '>> path' open the path for write or append.
Untrusted input passed to send_file() can run OS commands at the daemon process UID. The read-pipe form ('cmd |') also leaks subprocess stdout into the HTTP response body. The write-mode forms can create or truncate files at attacker chosen paths.
| Weakness | CWE-73 : External Control of File Name or Path |
|---|
Product status
Known affected
| Product | Score | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| HTTP-Daemon less than 6.17 |
|
Fixed
- HTTP-Daemon greater than or equal 6.17
giterlizzi
Namespace: https://github.com/giterlizzi/
gdt@cpan.org
References
- CPANSA-HTTP-Daemon-2026-8450 JSON self
https://raw.githubusercontent.com/giterlizzi/perl-CPANSA-CSAF/develop/csaf/white/2026/cpansa-http-daemon-2026-8450.json - https://github.com/libwww-perl/HTTP-Daemon/commit/945d35141d94490f749640bd4390acd6a2193995.patch external
https://github.com/libwww-perl/HTTP-Daemon/commit/945d35141d94490f749640bd4390acd6a2193995.patch - https://github.com/libwww-perl/HTTP-Daemon/pull/89 external
https://github.com/libwww-perl/HTTP-Daemon/pull/89 - https://metacpan.org/release/OALDERS/HTTP-Daemon-6.17/changes external
https://metacpan.org/release/OALDERS/HTTP-Daemon-6.17/changes - http://www.openwall.com/lists/oss-security/2026/05/27/5 external
http://www.openwall.com/lists/oss-security/2026/05/27/5 - CVE-2026-8450 (NVD) external
https://nvd.nist.gov/vuln/detail/CVE-2026-8450
Revision history
| Version | Date of the revision | Summary of the revision |
|---|---|---|
| 1 | Wed May 27 00:00:00 2026 | First release |
Sharing rules
TLP:WHITE
For the TLP version see: https://www.first.org/tlp/