CVE-2026-82957

LOWCVSS 5.5 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-918

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

1 mentions across 1 observed day

What's happening

1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d

Referenced assets1 URL

By indicator

https://github.com/hakaioffsec/CVE-2026-82957

Full discourse1 post

Dark Web Informer@DarkWebInformer1d
🚨 PoC released for a Hyperledger FireFly server-side request forgery vulnerability; CVE-2026-82957 PoC: https://github.com/hakaioffsec/CVE-2026-82957 The flaw affects FireFly webhook subscriptions, where a user-controlled webhook URL can be accepted without properly validating the destination host. This can allow the FireFly node to send requests to internal services, private networks, loopback addresses, and cloud metadata endpoints. CVSS: 8.5 High Affected: Hyperledger FireFly ≤ 1.5.0 The PoC creates a malicious webhook subscription, triggers a matching event, and verifies that the request originates from the FireFly server itself.
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