Vulnerability · Published Aug 31, 2026 · Assigned by VulDB
CVE-2026-82957hyperledger-firefly Webhook Subscription webhooks.go ValidateOptions server-side request forgery
High 7.3
In plain English
A high-severity server-side request forgery in firefly from hyperledger-firefly. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
A vulnerability was found in hyperledger-firefly firefly up to 1.4.0. The impacted element is the function ValidateOptions of the file internal/events/webhooks/webhooks.go of the component Webhook Subscription. Performing a manipulation of the argument url results in server-side request forgery. Remote exploitation of the attack is possible. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| hyperledger-firefly | firefly | 1.01.11.21.31.4.0 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
References
- VDB-397306 | hyperledger-firefly Webhook Subscription webhooks.go ValidateOptions server-side request forgery vdb-entry, technical-description
- VDB-397306 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- CVE-2026-82957 | CVE Analysis and Report third-party-advisory
- Submit #879847 | Hyperledger Firefly 1.4.0 Server-Side Request Forgery third-party-advisory