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CVE-2025-2886

15
FAUCET Score

CVE-2025-2886 is a medium-severity vulnerability affecting Amazon tough versions prior to 0.20.0, stemming from a missing validation of terminating delegations. This flaw allows a client to continue searching delegation lists even after encountering a terminating delegation, potentially leading to the retrieval of target contents from an incorrect source. With a CVSS score of 4.5 (AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N), exploitation requires high privileges and user interaction, primarily impacting integrity. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.20.0CPE matchmatch criteria
cpe:2.3:a:amazon:tough:*:*:*:*:*:rust:*:*
>= 0.1.0, < 0.20.0CPE match
cpe:2.3:a:amazon:tough:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 4.0

5.7MEDIUM

CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
HIGH
User Interaction
PASSIVE
VS Confidentiality
NONE
VS Integrity
HIGH
VS Availability
NONE
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.31%
Probability of exploitation in next 30 days
EPSS Percentile
23.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0031 is in the 26th percentile among its peer group of 4,937 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

rustpatch availablevia ghsa
Product: toughFixed in: 0.20.0
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

rustGHSA-v4wr-j3w6-mxqcmedium

tough terminating targets role delegations are not respected

Mar 28, 2025

References

aws.amazon.com / security/security-bulletins/AWS-2025-007
Vendor Advisory
github.com / awslabs/tough/releases/tag/tough-v0.20.0
github.com / awslabs/tough/security/advisories/GHSA-v4wr-j3w6-mxqc
Vendor Advisory