CVE-2021-32639

Server-Side Request Forgery (SSRF) in emissary:emissary

7.2 High

Emissary is a P2P-based, data-driven workflow engine. Emissary version 6.4.0 is vulnerable to Server-Side Request Forgery (SSRF). In particular, the RegisterPeerAction endpoint and the AddChildDirectoryAction endpoint are vulnerable to SSRF. This vulnerability may lead to credential leaks. Emissary version 7.0 contains a patch. As a workaround, disable network access to Emissary from untrusted sources.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: Low
Availability: Low

Exploit likelihood

1.40%Up 0.6 points since Jul 3, 2021

What each source reports

CVE List Score used 7.2

Server-Side Request Forgery (SSRF) in emissary:emissary

Record: CVE-2021-32639
CVSS 3.1: 7.2 HighCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L
Weakness: CWE-918
Updated: 2026-11-02

EUVDEUVD-2021-19466 7.2

Record: EUVD-2021-19466
CVSS 3.1: 7.2 HighCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L
Updated: 2026-11-03

NVD 7.2

Record: CVE-2021-32639
CVSS 3.1: 7.2 HighCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:L/A:L
CVSS 3.1: 9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS 2.0: 6.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
Weakness: CWE-918
Updated: 2026-11-02

OSV 9.9

Record: CVE-2021-32639
CVSS 3.1: 9.9 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-32639 is a high vulnerability (CVSS 7.2) in Nationalsecurityagency Emissary, published July 2, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.40%, the 72nd percentile. No source names a fixed version.