CVE-2026-40516
Last modified
CVE-2026-40516 is a medium-severity vulnerability rated 6.3/10 on the CVSS scale. OpenHarness before commit bd4df81 contains a server-side request forgery vulnerability in the web_fetch and web_search tools that allows attackers to access private and localhost HTTP services by manipulating tool parameters without proper validation of target addresses. Attackers can influence an agent session to invoke these tools against loopback, RFC1918, link-local, or other non-public addresses to read response bodies from local development services, cloud metadata endpoints, admin panels, or other private HTTP services reachable from the victim host.. EPSS estimates a 0.18% chance of exploitation in the next 30 days.
Description
OpenHarness before commit bd4df81 contains a server-side request forgery vulnerability in the web_fetch and web_search tools that allows attackers to access private and localhost HTTP services by manipulating tool parameters without proper validation of target addresses. Attackers can influence an agent session to invoke these tools against loopback, RFC1918, link-local, or other non-public addresses to read response bodies from local development services, cloud metadata endpoints, admin panels, or other private HTTP services reachable from the victim host.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Hkuds | Openharness | < 2026-04-11 |
References
- https://github.com/HKUDS/OpenHarness/pull/92Exploit, Issue Tracking
- https://github.com/HKUDS/OpenHarness/pull/92Exploit, Issue Tracking
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-40516?
How severe is CVE-2026-40516?
How do I fix CVE-2026-40516?
How Strix Helps
- One Click Account Takeover in GranolaHow a notification link broke out of Electron and led to a one-click account takeover.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-40505MuPDF before 1.27 contains an ANSI injection vulnerability i…4.8
- CVE-2026-4051IBM Engineering Lifecycle Management 7.0.3, 7.1.0, and 7.2.0…7.2
- CVE-2026-40510OpenSC before 0.27.0-rc1, fixed in commit 3f24f0b, contains …6.8
- CVE-2026-40512Rejected reason: This CVE ID has been rejected or withdrawn …
- CVE-2026-40514SmarterTools SmarterMail builds prior to 9610 contain a cryp…9.1
- CVE-2026-40515OpenHarness before commit bd4df81 contains a permission bypa…5.5
- CVE-2026-40517radare2 prior to 6.1.4 contains a command injection vulnerab…8.4
- CVE-2026-40518ByteDance DeerFlow before commit 2176b2b contains a path tra…9.1
- CVE-2026-40519Nginx Proxy Manager versions 2.9.14 through 2.15.1, fixed in…7.7
- CVE-2026-40520FreePBX api module version 17.0.8 and prior contain a comman…8.8
- CVE-2026-40521FrontAccounting before 2.4.20 contains a path traversal vuln…8.8
- CVE-2026-40522FrontAccounting before 2.4.20 contains a SQL injection vulne…7.1
Are you affected by CVE-2026-40516?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST