VulnSocial

CVE-2026-32887Patch(effectful / effect)

LOWCVSS 7.4 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch effectful effect systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Effect is a TypeScript framework that consists of several packages that work together to help build TypeScript applications. Prior to version 3.20.0, when using `RpcServer.toWebHandler` (or `HttpApp.toWebHandlerRuntime`) inside a Next.js App Router route handler, any Node.js `AsyncLocalStorage`-dependent API called from within an Effect fiber can read another concurrent request's context — or no context at all. Under production traffic, `auth()` from `@clerk/nextjs/server` returns a different user's session. Version 3.20.0 contains a fix for the issue.

effectful CVEsBack to dashboard
0.5/ 10 priority

Sources & remediation

Exploit / PoC references
Weakness type (CWE)
CWE-362

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • effect

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-03-21); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
effectful
Products
effect

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-03-21: 1Mentions · 2026-04-05: 1Patch / Workaround · 2026-03-21: 1Technical Details · 2026-04-05: 103-2104-05
Signal classification2 categories
Patch
150.0%
Disclosure
150.0%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-03-211
Patch1
2026-04-051
Disclosure1
Full discourse2 posts
  • PulsePatch.io@pulsepatchio
    Disclosure

    The `Effect` library experiences `AsyncLocalStorage` context loss/contamination (CVE-2026-32887) under concurrent RPC. This high-severity flaw impacts contextual data integrity. #AsyncContext #EffectTS #InfoSec https://www.pulsepatch.io/posts/cve-2026-32887-effect-asynclocalstorage-context

    Post summary

    The tweet announces a new, high‑severity flaw (CVE‑2026‑32887) in the Effect library that causes AsyncLocalStorage context contamination during concurrent RPC calls, with no mention of PoC, exploitation, or patches.

    0000032
    4 followersView on X
  • CVE@CVEnew
    Patch

    CVE-2026-32887 Effect is a TypeScript framework that consists of several packages that work together to help build TypeScript applications. Prior to version 3.20.0, when using `RpcS… https://www.cve.org/CVERecord?id=CVE-2026-32887

    Post summary

    The vulnerability CVE‑2026‑32887 is noted to be resolved in version 3.20.0 of the framework; no PoC, exploit, or active exploitation details are provided.

    00000150
    56.8K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appeffectfuleffect-node.js-

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