Vulnary
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Critical· 9.1

CVE-2026-8450

A critical flaw in the Perl module HTTP::Daemon allows attackers to run arbitrary operating‑system commands. The vulnerability is triggered when untrusted input is passed to the send_file() function, which can open pipes or write files. It affects all versions of HTTP::Daemon older than 6.17.

publishedMay 27, 2026
last modifiedJul 23, 2026
sourcesNVD
severity · cvss
9.1
critical · how bad it is
exploitation · epss
1%
70th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Sep 6, 2026

No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.

01

Who is affected

Perl developers using HTTP::Daemon versions earlier than 6.17, especially those running the daemon with elevated privileges.

02

Real-world impact

An attacker could execute any command on the host as the daemon’s user, read or modify files, and potentially exfiltrate data via the HTTP response. This could lead to full system compromise if the daemon runs with high privileges.

03

Why this severity

The CVSS score of 9.1 reflects the vulnerability’s network reachability, low attack complexity, and lack of required privileges or user interaction. The attacker can gain complete confidentiality and integrity impact by exploiting the flaw.

04

What to do about it

no official fix yet

No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.

No fix documented in sources

05

Timeline

  1. May 27, 2026 · May 27, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 23, 2026 · 12d ago
    Advisory updated
    The NVD record was last revised.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactNone
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →