#VU106240 Always-Incorrect Control Flow Implementation in tough - CVE-2025-2886

Vulnerability identifier: #VU106240

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-2886

CWE-ID: CWE-670

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
tough
Web applications / JS libraries

Vendor: Amazon Web Services

Description

The vulnerability allows a remote user to compromise the target system.

The vulnerability exists due to terminating targets role delegations are not respected. A remote administrator can provide arbitrary contents to clients for targets owned by the delegating identity.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

tough: 0.1.0 - 0.19.0

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External links
https://aws.amazon.com/security/security-bulletins/AWS-2025-007/
https://github.com/awslabs/tough/security/advisories/GHSA-v4wr-j3w6-mxqc

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.