CVE-2025-2886: tough — Fix

Description

Missing validation of terminating delegation causes the client to continue searching the defined delegation list, even after searching a terminating delegation. This could cause the client to fetch a target from an incorrect source, altering the target contents. Users should upgrade to tough version 0.20.0 or later and ensure any forked or derivative code is patched to incorporate the new fixes.

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CVSS v3.1 Score

4.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N

Weakness Type (CWE)

CWE-670 CWE-670

Affected Products

Vendor	Product	Versions
amazon	tough	< 0.20.0

References

Advisories & Patches

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

Other References

https://github.com/awslabs/tough/releases/tag/tough-v0.20.0

Frequently Asked Questions

What is CVE-2025-2886? +

Missing validation of terminating delegation causes the client to continue searching the defined delegation list, even after searching a terminating delegation. This could cause the client to fetch a target from an incorrect source, altering the target contents. Users should upgrade to tough version 0.20.0 or later and ensure any forked or derivative code is patched to incorporate the new fixes. It has a CVSS v3.1 base score of 4.5 (MEDIUM).

How severe is CVE-2025-2886? +

CVE-2025-2886 has a CVSS v3.1 score of 4.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-2886? +

CVE-2025-2886 affects products from amazon, specifically: tough. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-2886? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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