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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-32887

25
FAUCET Score

CVE-2026-32887 is a high-severity vulnerability affecting the Effect TypeScript framework prior to version 3.20.0, specifically when used with Next.js App Router route handlers. This flaw allows Node.js AsyncLocalStorage-dependent APIs to incorrectly access another concurrent request's context, potentially leading to sensitive data leakage, such as a different user's session. Rated 7.4 HIGH on CVSS, exploitation requires high attack complexity over the network, with significant confidentiality and integrity impacts. There is currently no evidence of active exploitation, public exploit code, or significant community discussion regarding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.20.0CPE matchmatch criteria
cpe:2.3:a:effectful:effect:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

7.4HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.27%
Probability of exploitation in next 30 days
EPSS Percentile
19.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0027 is in the 2nd percentile among its peer group of 8,915 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

npmpatch availablevia ghsa
Product: effectFixed in: 3.20.0
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

npmGHSA-38f7-945m-qr2ghigh

Effect `AsyncLocalStorage` context lost/contaminated inside Effect fibers under concurrent load with RPC

Mar 20, 2026

References

github.com / Effect-TS/effect/security/advisories/GHSA-38f7-945m-qr2g
ExploitVendor Advisory