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CVE-2026-45741— Gotenberg: SSRF deny-list bypass in IsPublicIP via IPv6 6to4 / NAT64 / site-local prefixes

CVSS 7.5 · High EPSS 0.87% · P56

Affected Version Matrix 1

VendorProductVersion RangeStatus
gotenberggotenberg< 8.33.0affected
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I. Basic Information for CVE-2026-45741

Vulnerability Information
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Vulnerability Title
Gotenberg: SSRF deny-list bypass in IsPublicIP via IPv6 6to4 / NAT64 / site-local prefixes
Source: CVE Program / CVE List V5
Vulnerability Description
Gotenberg is a Docker-powered stateless API for PDF files. In 8.32.0 and earlier, the IsPublicIP function in pkg/gotenberg/outbound.go does not reject the 2002::/16 6to4 prefix, the 64:ff9b::/96 and 64:ff9b:1::/48 NAT64 prefixes, the fec0::/10 deprecated site-local prefix, Teredo, and other transition prefixes that can embed or route to non-public IPv4 destinations. The addr.Unmap operation only handles IPv4-mapped IPv6 addresses, so a crafted DNS AAAA record can cause the outbound HTTP client to treat an address wrapping an internal destination such as 169.254.169.254 as public. An unauthenticated attacker can use a conversion route with WithDenyPrivateIPs enabled to reach cloud metadata services, and the Chromium URL conversion route can return the internal response as a PDF, potentially exposing cloud credentials. Exploitation requires a deployment whose host routes the relevant IPv6 prefix, such as a dual-stack or NAT64-enabled environment. This issue is fixed in version 8.33.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不完整的黑名单
Source: CVE Program / CVE List V5
Vulnerability Title
Gotenberg 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Gotenberg是Gotenberg团队开源的一个文档转换应用服务器。 Gotenberg 8.33.0之前版本存在安全漏洞，该漏洞源于IsPublicIP函数未正确拒绝某些IPv6转换前缀，导致特制DNS AAAA记录可将内部地址视为公网，未经身份验证的攻击者可能利用转换路由访问云元数据服务，造成云凭据泄露。
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

VendorProductAffected VersionsCPESubscribe
gotenberggotenberg < 8.33.0 -

II. Public POCs for CVE-2026-45741

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 8797 chars
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III. Intelligence Information for CVE-2026-45741

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Patches & Fixes for CVE-2026-45741 (1)

Vendor Advisories for CVE-2026-45741 (1)

Vendor Pages for CVE-2026-45741 (1)

Same Patch Batch · gotenberg · 2026-08-19 · 3 CVEs total

CVE-2026-448298.8 HIGHGotenberg: Path traversal in zip entry name via Windows-style separators in upload filenam
CVE-2026-457427.5 HIGHGotenberg: Concurrent Execution using Shared Resource with Improper Synchronization ('Race

IV. Related Vulnerabilities

Same product: gotenberg
Same vendor: gotenberg
Same weakness: CWE-184

V. Comments for CVE-2026-45741

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