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CVE-2026-63404— Faktory: Insecure predictable /tmp/redis.conf enables local Redis config hijack (network exposure / root RCE primitive)

Quick assessment

Affected
contribsys faktory
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

contribsys Faktory是contribsys公司开源的一个后台作业工作服务器。 contribsys Faktory 1.10.0之前版本存在资源管理错误漏洞，该漏洞源于对临时文件处理不安全，将启动配置写入固定可预测的/tmp/redis.conf路径且不验证其内容，可能允许本地低权限用户劫持Redis配置，导致权限提升至root并执行任意代码。

CVSS 7.3 · High EPSS 0.16% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
contribsys faktory < 1.10.0 affected
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I. Basic Information for CVE-2026-63404

Vulnerability Information
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Vulnerability Title
Faktory: Insecure predictable /tmp/redis.conf enables local Redis config hijack (network exposure / root RCE primitive)
Source: CVE Program / CVE List V5
Vulnerability Description
Faktory is a language-agnostic background job server. In versions prior to 1.10.0, the embedded Redis bootstrapper is vulnerable to an insecure temporary file flaw that lets a local unprivileged user hijack the Redis configuration and escalate to root. It writes its startup configuration to a fixed, predictable, world-writable path, /tmp/redis.conf, only creating the file if it does not already exist and never validating it on later boots. Because /tmp is world-writable, a local unprivileged user can pre-create /tmp/redis.conf with attacker-chosen Redis directives before Faktory starts, and Faktory will use the planted file verbatim. Faktory only overrides the unixsocket, dir, and logfile options, leaving directives such as bind, protected-mode, requirepass, and loadmodule attacker-controlled. This lets an attacker silently expose the entire job queue over an unauthenticated network port with no visible error to the administrator. Because the official systemd unit runs Faktory, and the redis-server child it spawns, as root, an attacker can also supply a loadmodule directive to execute arbitrary native code in the root-owned Redis process, escalating from a local unprivileged user to root. This issue is fixed in version 1.10.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
不安全的临时文件
Source: CVE Program / CVE List V5
Vulnerability Title
contribsys Faktory 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
contribsys Faktory是contribsys公司开源的一个后台作业工作服务器。 contribsys Faktory 1.10.0之前版本存在资源管理错误漏洞，该漏洞源于对临时文件处理不安全，将启动配置写入固定可预测的/tmp/redis.conf路径且不验证其内容，可能允许本地低权限用户劫持Redis配置，导致权限提升至root并执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
contribsys faktory < 1.10.0 -

II. Public POCs for CVE-2026-63404

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Reproduced successfully in a real sandbox · Below is the actual recording of building the environment and exploiting the vulnerability.
Success marker: VULNERABLE: attacker-planted /tmp/redis.conf hijacked embedded redis (unauthenticated PONG on 0.0.0.0:9999); exfiltrated proof flag: PROOF_7ef512bac4e91072
Reproduction recording is a Pro+ exclusive
Watch the full sandbox build + live exploit recording for this CVE. Limited-time ¥499/mo.
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claude_code · 8393 chars
GitHub 复现环境（可 clone 直接跑）
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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III. Intelligence Information for CVE-2026-63404

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Patches & Fixes for CVE-2026-63404 (1)

Vendor Advisories for CVE-2026-63404 (1)

Vendor Pages for CVE-2026-63404 (1)

IV. Related Vulnerabilities

Same product: faktory
Same vendor: contribsys
Same weakness: CWE-377

V. Comments for CVE-2026-63404

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