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CVE-2026-86735— snipe-it before 8.7.0 SSRF via IPv6 transition address bypass

Quick assessment

Affected

grokability snipe-it

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.

Snipe-IT 8.7.0 之前的版本存在一个服务器端请求伪造（SSRF）漏洞，位于 ExternalUrl 验证规则中，该规则无法检测以 IPv6 过渡地址形式编码的内网 IPv4 目标。拥有超级管理员权限的攻击者可以配置使用 NAT64、6to4 或 Teredo 等 IPv6 过渡地址的 Webhook URL，从而绕过 SSRF 防护机制，进而访问内部服务或云元数据端点。

CVSS 5.0 · Medium Updated Sep 08, 2026

Possible ATT&CK Techniques 3 AI

T1021 · Remote Services T1090 · Proxy T1071 · Application Layer Protocol

Affected Version Matrix 2

Vendor	Product	Version Range	Status
grokability	snipe-it	`< 8.7.0`	affected
		`8.7.0`	unaffected

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Vulnerability Information

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Vulnerability Title

snipe-it before 8.7.0 SSRF via IPv6 transition address bypass

Source: CVE Program / CVE List V5

Vulnerability Description

snipe-it versions before 8.7.0 contain a server-side request forgery vulnerability in the ExternalUrl validation rule that fails to detect IPv6 transition addresses encoding private IPv4 targets. Attackers with super-admin privileges can configure webhook URLs using NAT64, 6to4, or Teredo transition addresses to bypass SSRF guards and access internal services or cloud metadata endpoints.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:L/A: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
grokability	snipe-it	0 ~ 8.7.0	-

II. Public POCs for CVE-2026-86735

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-86735

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Vendor Advisories for CVE-2026-86735 (2)

🔗 IPv6 transition address bypass of webhook URL SSRF guard · Advisory · grokability/snipe-it · GitHub Read full article vendor-advisory
🔗 snipe-it before 8.7.0 SSRF via IPv6 transition address bypass | Advisories | VulnCheck third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-86735

Same Patch Batch · grokability · 2026-09-08 · 6 CVEs total

CVE-2026-86738	8.7 HIGH	Snipe-IT before 8.7.0 CSS Injection via Custom CSS
CVE-2026-86733	7.2 HIGH	Snipe-IT before 8.7.0 Remote Code Execution via Backup Restore
CVE-2026-86734	6.5 MEDIUM	Snipe-IT before 8.7.1 Denial of Service via Unbounded Note Field
CVE-2026-86736	4.3 MEDIUM	snipe-it before 8.7.0 Checkout Request Counter Integrity Failure
CVE-2026-86737	4.3 MEDIUM	snipe-it before 8.7.0 Missing Authorization via barcode endpoint

IV. Related Vulnerabilities

Same product: snipe-it

Same vendor: grokability

Same weakness: CWE-918

V. Comments for CVE-2026-86735

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

CVE-2026-86735— snipe-it before 8.7.0 SSRF via IPv6 transition address bypass

Quick assessment

Possible ATT&CK Techniques 3 AI

Affected Version Matrix 2

I. Basic Information for CVE-2026-86735

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2026-86735

III. Intelligence Information for CVE-2026-86735

Vendor Advisories for CVE-2026-86735 (2)

Same Patch Batch · grokability · 2026-09-08 · 6 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2026-86735

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