CVE-2026-56708— Grav API Plugin before 1.0.16 SSRF via DNS Rebinding
Quick assessment
Affected
getgrav grav
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.
getgrav Grav是getgrav个人开发者开源的一款一套可扩展的内容管理系统。 getgrav grav 1.0.16之前版本存在竞争条件问题漏洞，该漏洞源于Webhook传输中的服务端请求伪造漏洞，允许攻击者通过DNS重绑定绕过主机名验证，从而访问内部网络资源。
Possible ATT&CK Techniques 2 AI
T1557 · Adversary-in-the-Middle T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-56708
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Grav API Plugin before 1.0.16 SSRF via DNS Rebinding
Source: CVE Program / CVE List V5
Vulnerability Description
Grav API plugin before 1.0.16 contains a server-side request forgery vulnerability in webhook delivery that allows attackers to bypass hostname validation by DNS rebinding. Attackers controlling authoritative DNS for a configured webhook hostname can answer validation lookups with public addresses and delivery lookups with private addresses to reach internal network resources.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5
Vulnerability Title
getgrav grav 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
getgrav Grav是getgrav个人开发者开源的一款一套可扩展的内容管理系统。 getgrav grav 1.0.16之前版本存在竞争条件问题漏洞，该漏洞源于Webhook传输中的服务端请求伪造漏洞，允许攻击者通过DNS重绑定绕过主机名验证，从而访问内部网络资源。
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
II. Public POCs for CVE-2026-56708
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-56708
请登录查看更多情报信息。
Vendor Advisories for CVE-2026-56708 (2)
-
-
🔗 Grav API Plugin before 1.0.16 SSRF via DNS Rebinding | Advisories | VulnCheck third-party-advisory
Same Patch Batch · getgrav · 2026-08-25 · 15 CVEs total
| CVE-2026-56710 | 9.8 CRITICAL | Grav Login Plugin before 1.0.16 Privilege Escalation via Unlock |
| CVE-2026-75574 | 8.8 HIGH | Grav before 4.2.2 Remote Code Execution via Email Twig |
| CVE-2026-72696 | 8.4 HIGH | Grav CMS before 2.0.16 Symlink Following via createLockFile |
| CVE-2026-72695 | 8.1 HIGH | Grav before 2.0.16 Path Traversal via MediaUploadTrait deleteFile |
| CVE-2026-56707 | 7.7 HIGH | Grav Flex Objects 1.4.0 through 1.4.7 Authorization Bypass via Shortcode |
| CVE-2026-72700 | 7.5 HIGH | Grav before 3.9.1 Timing Attack via Non-Constant-Time Token Comparison |
| CVE-2026-76846 | 7.5 HIGH | Grav before 2.0.16 Information Disclosure via Twig Sandbox |
| CVE-2026-56709 | 7.5 HIGH | Grav before 3.9.2 Host Header Injection via sendInvitationEmail |
| CVE-2026-72698 | 6.5 MEDIUM | Grav CMS before 2.0.16 Information Disclosure via Twig Sandbox Bypass |
| CVE-2026-72697 | 6.5 MEDIUM | Grav CMS before 2.0.16 Path Traversal via media_directory |
| CVE-2026-76839 | 6.5 MEDIUM | Grav before 2.0.16 Information Disclosure via offsetGet |
| CVE-2026-72702 | 5.4 MEDIUM | Grav CMS before 2.0.16 Origin Validation Bypass via Referer |
| CVE-2026-72699 | 5.3 MEDIUM | Grav Login Plugin before 3.9.1 Email Enumeration via Registration |
| CVE-2026-72701 | 3.7 LOW | Grav CMS before 2.0.16 Timing Attack via verifyNonce |
IV. Related Vulnerabilities
Same product: grav
-
CVE-2026-100670
Grav CMS 2.0.14 through 2.0.24 Privilege Escalation via Blue -
CVE-2026-100671
Grav before 2.0.25 Session Cookie Theft via Twig Sandbox -
CVE-2026-100669
Grav before 2.0.25 Sensitive File Disclosure via Case-Variat -
CVE-2026-100668
Grav before 2.0.25 Sandbox Escape via array Filter -
CVE-2026-100667
grav-plugin-login 3.8.7 through 3.9.6 Two-Factor Authenticat
Same vendor: getgrav
-
CVE-2026-100673
Grav Data Manager before 1.4.5 Stored XSS via item-detail vi -
CVE-2026-100672
grav-plugin-comments before 1.2.11 Unauthenticated Informati -
CVE-2026-100671
Grav before 2.0.25 Session Cookie Theft via Twig Sandbox -
CVE-2026-100670
Grav CMS 2.0.14 through 2.0.24 Privilege Escalation via Blue -
CVE-2026-100669
Grav before 2.0.25 Sensitive File Disclosure via Case-Variat
Same weakness: CWE-367
-
CVE-2026-108698
hyper-mcp through 0.8.3 OCI Plugin Signature Verification TO -
CVE-2026-108741
Shepherd through 0.3.1 SSRF via DNS Rebinding in Citation Ch -
CVE-2026-73179
Apache CXF: JPA authorization-code consume is non-atomic -
CVE-2026-106451
yawkat LZ4 Java: Native library extraction to a shared tempo -
CVE-2026-89430
Gitea push mirror SSRF and forced writes to internal Git hos
V. Comments for CVE-2026-56708
No comments yet