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.
Published: 2026-08-31
Score: 6.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The vulnerability lies in the ValidateOptions function in the webhooks.go file of the Webhook Subscription component. A malicious actor can manipulate the url parameter supplied to the function, causing the server to perform an outbound HTTP request to an arbitrary destination. This server‑side request forgery could lead to unauthorized data exposure, credential theft, or internal network attacks. The vulnerability is rated CVSS 6.9, indicating a medium severity with potential for remote exploitation.

Affected Systems

Implementations of Hyperledger Firefly Firefly up to and including version 1.4.0 are affected. The flaw exists across all environments where the vulnerable code is deployed; versions beyond 1.4.0 are assumed to be safe until proven otherwise.

Risk and Exploitability

Risk assessment shows a CVSS score of 6.9, a moderate severity. The EPSS score is not available, and the vulnerability is not listed in the CISA KEV catalog. However, the public exploit indicates that attackers can target this flaw remotely. The likely attack vector is the API endpoint that accepts webhook subscription URLs, as the vulnerability is triggered by manipulating that URL argument. Organizations should treat this as a significant threat until a patch is applied.

Generated by OpenCVE AI on August 31, 2026 at 23:20 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest Hyperledger Firefly release that addresses this flaw, ideally version 1.4.1 or later.
  • If an immediate update is not possible, restrict outbound requests from the Firefly service by configuring a firewall or network access control list to block connections to untrusted IP ranges.
  • Implement strict server‑side validation that rejects or sanitizes URLs that point to internal service endpoints or use protocols such as file:// or gopher://.
  • Monitor logs for unexpected outbound HTTP traffic from the Firefly application.

Generated by OpenCVE AI on August 31, 2026 at 23:20 UTC.

Tracking

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Advisories

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History

Mon, 31 Aug 2026 22:15:00 +0000

Type Values Removed Values Added
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.
Title hyperledger-firefly Webhook Subscription webhooks.go ValidateOptions server-side request forgery
First Time appeared Firefly
Firefly firefly
Weaknesses CWE-918
CPEs cpe:2.3:a:firefly:firefly:*:*:*:*:*:*:*:*
Vendors & Products Firefly
Firefly firefly
References
Metrics cvssV2_0

{'score': 7.5, 'vector': 'AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 7.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 7.3, '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'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P'}

Subscriptions

Firefly Firefly
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-08-31T22:00:11.629Z

Reserved: 2026-08-31T12:43:33.880Z

Link: CVE-2026-82957

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-08-31T22:17:34.250

Modified: 2026-08-31T22:17:34.250

Link: CVE-2026-82957

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-31T23:30:06Z

Weaknesses
  • CWE-918

    Server-Side Request Forgery (SSRF)