Vulnerability in libhttp-daemon-perl (DEBIAN-CVE-2026-8450)

Summary

Vulnerability in libhttp-daemon-perl (DEBIAN-CVE-2026-8450). Confidential information can be exposed externally. Mitigation: upgrade to 6.17-1 or later.

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as DEBIAN-CVE-2026-8450 has been found in libhttp-daemon-perl.
Confidential information can be exposed externally.
What to do: upgrade libhttp-daemon-perl to 6.17-1 or later.
If unsure, ask your IT team or search "libhttp-daemon-perl DEBIAN-CVE-2026-8450" on the vendor's site.

DEBIAN-CVE-2026-8450 (libhttp-daemon-perl)
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 6.17-1 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (unclassified) exists in libhttp-daemon-perl.

📍 Affected scope

Check the vendor advisory for the affected versions of libhttp-daemon-perl.

🔥 Severity

Severity: ?. Confidential information can be exposed externally.

🔧 How to fix

Update to 6.17-1.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'libhttp-daemon-perl' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
grep -r 'libhttp-daemon-perl' . | grep -v node_modules
```
リポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で libhttp-daemon-perl を grep し、稼働しているサービス・バージョンを把握する。
2
Apply patch patch
```
Upgrade libhttp-daemon-perl to 6.17-1
```
ステージング環境で 6.17-1 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
3
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

Debian:11 libhttp-daemon-perl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:12 libhttp-daemon-perl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.16-1+deb13u1~deb12u1"}]}]

Debian:13 libhttp-daemon-perl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.16-1+deb13u1"}]}]

Debian:14 libhttp-daemon-perl

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.17-1"}]}]

References

advisory security-tracker.debian.org