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CVE-2026-73297— Microsoft UFO: IPv6 transition address bypass of SSRF guard in URL validation

Quick assessment

Affected
microsoft UFO
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.

Microsoft UFO是美国Microsoft公司的一款Web服务器。 Microsoft UFO 3.0.8之前版本存在服务端请求伪造漏洞，该漏洞源于ufo/utils/url_security.py中的_is_blocked_ip函数未阻止NAT64、6to4和Teredo前缀，且未重新检查嵌入的IPv4目标，可能导致未经身份验证的远程攻击者绕过SSRF防护，访问云元数据、内部服务或本地主机。

CVSS 6.9 · Medium EPSS 2.90% · P86

Affected Version Matrix 1

VendorProduct Version RangeStatus
microsoft UFO < 3.0.8 affected
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I. Basic Information for CVE-2026-73297

Vulnerability Information
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Vulnerability Title
Microsoft UFO: IPv6 transition address bypass of SSRF guard in URL validation
Source: CVE Program / CVE List V5
Vulnerability Description
Microsoft UFO open-source framework for intelligent automation across devices and platforms. Prior to 3.0.8, _is_blocked_ip in ufo/utils/url_security.py did not block NAT64 prefixes 64:ff9b::/96 and 64:ff9b:1::/48, the 6to4 prefix 2002::/16, or the Teredo prefix 2001::/32 and did not re-check embedded IPv4 destinations, allowing an unauthenticated remote attacker who can influence URLs processed by validate_url to bypass the SSRF guard and reach cloud metadata, internal services, or localhost. This issue is fixed in version 3.0.8.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/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
Vulnerability Title
Microsoft UFO 服务端请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft UFO是美国Microsoft公司的一款Web服务器。 Microsoft UFO 3.0.8之前版本存在服务端请求伪造漏洞，该漏洞源于ufo/utils/url_security.py中的_is_blocked_ip函数未阻止NAT64、6to4和Teredo前缀，且未重新检查嵌入的IPv4目标，可能导致未经身份验证的远程攻击者绕过SSRF防护，访问云元数据、内部服务或本地主机。
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
microsoft UFO < 3.0.8 -

II. Public POCs for CVE-2026-73297

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III. Intelligence Information for CVE-2026-73297

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Patches & Fixes for CVE-2026-73297 (2)

Vendor Advisories for CVE-2026-73297 (1)

Same Patch Batch · microsoft · 2026-08-12 · 4 CVEs total

CVE-2026-73299 10.0 CRITICAL Prompty: Server-Side Template Injection to Remote Code Execution in the @prompty/core Nunj
CVE-2026-73296 9.4 CRITICAL Microsoft UFO: Unauthenticated Mobile MCP access allows remote Android device control and
CVE-2026-73298 8.7 HIGH Microsoft Container Migration Solution Accelerator: Authenticated IDOR allowing read/write

IV. Related Vulnerabilities

Same product: UFO
Same vendor: microsoft
Same weakness: CWE-918

V. Comments for CVE-2026-73297

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