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

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-86419— MISP Insufficient Outbound URL Validation Allows SSRF and Credential Disclosure via Feed Redirects and TAXII Discovery

Quick assessment

Affected
MISP MISP
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.

以下是对该漏洞描述信息的中文翻译： 受影响版本 受影响的 MISP 版本在从远程源（feed）获取数据及 TAXII 发现功能中，对服务器端出站 HTTP 目标地址的验证不足。 在数据源（feed）处理过程中，系统会跟随重定向，但并未验证重定向的协议方案（scheme）或目标地址。原始请求头在多次重定向跳转中被复用，这意味着为某个数据源配置的身份验证头或 API 凭证可能会被转发到另一个主机上。此外，重定向还可以指向内部网络资源，从而引发服务器端请求伪造（SSRF）。修复方案包括：增加对重定向的验证；对于跨主机的重

CVSS 7.0 · High

Possible ATT&CK Techniques 1 AI

T1071 · Application Layer Protocol

Affected Version Matrix 1

VendorProduct Version RangeStatus
MISP MISP ≤ 2.5.45 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-86419

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
MISP Insufficient Outbound URL Validation Allows SSRF and Credential Disclosure via Feed Redirects and TAXII Discovery
Source: CVE Program / CVE List V5
Vulnerability Description
Affected versions of MISP contain insufficient validation of server-side outbound HTTP destinations in feed retrieval and TAXII discovery functionality. In feed processing, redirects were followed without validating the redirect scheme or destination. The original request headers were reused across redirect hops, meaning authentication headers or API credentials configured for a feed could be forwarded to a different host. Redirects could also target internal network resources, resulting in SSRF. The fix adds redirect validation, blocks internal destinations for cross-host redirects, strips configured feed credentials before following redirects to another host, and pins validated DNS results to prevent re-resolution after validation. The TAXII discovery endpoint had a related incomplete SSRF defense. It used gethostbyname() and compared the result against only a few literal addresses. This missed cases including IPv6 loopback (::1), numeric host encodings such as 0x7f000001, and potentially multiple DNS records. The fix moves TAXII discovery to the shared URL egress validator. Together, these commits harden MISP's outbound URL handling against alternate-address representations, DNS-related bypasses, unsafe redirects, internal-host access, and cross-host credential forwarding. Version affected: ≤2.5.45
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:L/VA:H/SC:H/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
MISP MISP 0 ~ 2.5.45 -

II. Public POCs for CVE-2026-86419

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-86419

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-86419 (2)

Same Patch Batch · MISP · 2026-09-07 · 11 CVEs total

CVE-2026-86452 8.7 HIGH MISP Unauthenticated Mail Endpoints Allow Unbounded Storage Consumption and Request Floodi
CVE-2026-86347 7.1 HIGH MISP Missing Authorization on Template File Upload Allows Authenticated Disk Exhaustion
CVE-2026-86408 7.1 HIGH MISP Missing Authorization in Cryptographic Key View Exposes Signing Keys from Protected E
CVE-2026-86342 5.3 MEDIUM MISP Freetext Feed Preview Improper Authorization Exposes Restricted Event and Feed Inform
CVE-2026-86417 5.3 MEDIUM MISP Dashboard Template REST API Exposes Template Owner Email Addresses to Unauthorized Us
CVE-2026-86451 5.3 MEDIUM MISP Event Graph Object Reference Lookup Exposes References from Unauthorized Objects
CVE-2026-86351 5.1 MEDIUM MISP User Homepage Validation Allows Authenticated Open Redirect via Protocol-Relative URL
CVE-2026-86440 5.1 MEDIUM MISP Dashboard Button Widget Allows Stored XSS via Unsafe javascript: and Backslash URLs
CVE-2026-86418 2.3 LOW MISP Dashboard Organisation Picker Exposes Hidden Organisation Metadata to Unauthorized Us
CVE-2026-86441 2.3 LOW MISP Dashboard Organisation Widgets Bypass Organisation-Index Restrictions and Expose Hidd

IV. Related Vulnerabilities

Same product: MISP
Same vendor: MISP
Same weakness: CWE-918

V. Comments for CVE-2026-86419

No comments yet

Leave a comment