Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-42248— Missing Signature Verification for Updates in Ollama

Quick assessment

Affected
Ollama Ollama
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Ollama是Ollama开源的一个可以在本地设备上运行、管理和自定义大语言模型的工具。 Ollama 0.12.10版本至0.17.5版本存在安全漏洞，该漏洞源于下载更新可执行文件时未执行完整性或真实性验证，Windows实现无条件返回成功，在暂存或执行更新有效载荷前未进行数字签名或信任验证，可能导致攻击者提供的可执行文件被接受并执行。

AI Predicted 8.1 Difficulty: Hard EPSS 0.72% · P52

Public Exploits 1

Metasploit · 1 ollama_auto_update.rb#CVE-2026-42248 [exploit]

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Ollama Ollama 0.12.10≤ 0.17.5 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-42248

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Missing Signature Verification for Updates in Ollama
Source: CVE Program / CVE List V5
Vulnerability Description
Ollama for Windows does not perform integrity or authenticity verification of downloaded update executables. Unlike other platforms, the Windows implementation of the update verification routine unconditionally returns success so no digital signature or trust validation is performed before staging or executing update payloads, enabling attacker‑supplied executables to be accepted and later executed by the application. Critically, Ollama for Windows performs silent automatic updates, so the malicious payload may be installed automatically without user awareness. Maintainers of this project were notified early about this vulnerability, but didn't respond with the details of vulnerability or vulnerable version range. Versions from 0.12.10 to 0.17.5 were tested and confirmed as vulnerable, other versions were not tested but might also be vulnerable.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
下载代码缺少完整性检查
Source: CVE Program / CVE List V5
Vulnerability Title
Ollama 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ollama是Ollama开源的一个可以在本地设备上运行、管理和自定义大语言模型的工具。 Ollama 0.12.10版本至0.17.5版本存在安全漏洞，该漏洞源于下载更新可执行文件时未执行完整性或真实性验证，Windows实现无条件返回成功，在暂存或执行更新有效载荷前未进行数字签名或信任验证，可能导致攻击者提供的可执行文件被接受并执行。
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
Ollama Ollama 0.12.10 ~ 0.17.5 -

II. Public POCs for CVE-2026-42248

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-42248

请登录查看更多情报信息。

Security Blog Posts for CVE-2026-42248 (1)

IV. Related Vulnerabilities

Same product: Ollama
Same vendor: Ollama
Same weakness: CWE-494

V. Comments for CVE-2026-42248

No comments yet

Leave a comment