CVE-2026-8450
9.1
CRITICAL · CVSS 3.1 · EPSS 2.6% (pctl 85)
In your normal cycle
Critical by CVSS (9.1), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.1 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| EPSS | 2.61% — more likely to be exploited than 85% of all CVEs |
| Weakness | CWE-73 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2026-05-27 |
| Last modified | 2026-07-23 |
References
- https://github.com/libwww-perl/HTTP-Daemon/commit/945d35141d94490f749640bd4390acd6a2193995.patch
- https://github.com/libwww-perl/HTTP-Daemon/pull/89
- https://metacpan.org/release/OALDERS/HTTP-Daemon-6.17/changes
- http://www.openwall.com/lists/oss-security/2026/05/27/5
- https://lists.debian.org/debian-lts-announce/2026/06/msg00028.html
- https://access.redhat.com/errata/RHSA-2026:36187
- https://access.redhat.com/errata/RHSA-2026:36188
- https://access.redhat.com/errata/RHSA-2026:36189
- https://access.redhat.com/security/cve/CVE-2026-8450
- https://bugzilla.redhat.com/show_bug.cgi?id=2481773
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8450.json
→ the Explorer · watch your stack · NVD