CVE-2026-82957Network attack vector

Unauthenticated SSRF via unrestricted webhook destination

Published Aug 31, 2026 · Updated Sep 1, 2026

SSRF in Hyperledger FireFly 1.0 through 1.4.0 allows remote attackers to send server-originated requests via webhook subscription URLs. ValidateOptions passes the user-controlled url from TransportOptions into a Resty request without restricting its destination, and delivery later executes that request. No authentication or user interaction is required; the result is access to network destinations reachable from the FireFly server.

CVSS severity7.3
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in Hyperledger FireFly 1.0 through 1.4.0 allows remote attackers to send server-originated requests via webhook subscription URLs. ValidateOptions passes the user-controlled url from TransportOptions into a Resty request without restricting its destination, and delivery later executes that request. No authentication or user interaction is required; the result is access to network destinations reachable from the FireFly server.

The record

CVE
CVE-2026-82957
Published
Aug 31, 2026
Updated
Sep 1, 2026
Vendor
Hyperledger FireFly
Product
Hyperledger FireFly
Classifications
CWE-918, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0
  2. Affected versionversion=1.1
  3. Affected versionversion=1.2
  4. Affected versionversion=1.3
  5. Affected versionversion=1.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Hyperledger FireFly · Hyperledger FireFlyversion=1.0; version=1.1; version=1.2; version=1.3; version=1.4.0

Published CVSS scores

7.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
5.5VulDB CNACVSS: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
7.5VulDB CNAAV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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