TI-2022-13223 Aliases CVE-2022-31183 GHSA-2cpx-6pqp-wf35

mTLS client verification is skipped in fs2 on Node.js

HIGH 82CWE-295Published 2022-08-01 · Updated 2025-04-22

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Spoofing
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-295.

Summary

fs2 is a compositional, streaming I/O library for Scala. When establishing a server-mode `TLSSocket` using `fs2-io` on Node.js, the parameter `requestCert = true` is ignored, peer certificate verification is skipped, and the connection proceeds. The vulnerability is limited to: 1. `fs2-io` running on Node.js. The JVM TLS implementation is completely independent. 2. `TLSSocket`s in server-mode. Client-mode `TLSSocket`s are implemented via a different API. 3. mTLS as enabled via `requestCert = true` in `TLSParameters`. The default setting is `false` for server-mode `TLSSocket`s. It was introduced with the initial Node.js implementation of fs2-io in 3.1.0. A patch is released in v3.2.11. The requestCert = true parameter is respected and the peer certificate is verified. If verification fails, a SSLException is raised. If using an unpatched version on Node.js, do not use a server-mode TLSSocket with requestCert = true to establish a mTLS connection.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.0083 57th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed fs2 (typelevel): 3.2.11co.fs2:fs2-io (Maven): 3.2.11+5 more products

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
http4s	fs2	3.1.0 to before 3.2.11	3.2.11	Patch available	CNA
—	co.fs2:fs2-io (Maven)	3.1.0 to before 3.2.11	3.2.11	Patch available	GHSA-2cpx-6pqp-wf35
—	co.fs2:fs2-io_2.12 (Maven)	3.1.0 to before 3.2.11	3.2.11	Patch available	GHSA-2cpx-6pqp-wf35
—	co.fs2:fs2-io_3 (Maven)	3.1.0 to before 3.2.11	3.2.11	Patch available	GHSA-2cpx-6pqp-wf35
—	co.fs2:fs2-io_2.13 (Maven)	3.1.0 to before 3.2.11	3.2.11	Patch available	GHSA-2cpx-6pqp-wf35
—	co.fs2:fs2-io_sjs1_2.13 (Maven)	3.1.0 to before 3.2.11	3.2.11	Patch available	GHSA-2cpx-6pqp-wf35
—	co.fs2:fs2-io_sjs1_3 (Maven)	3.1.0 to before 3.2.11	3.2.11	Patch available	GHSA-2cpx-6pqp-wf35

fs2 Vendorhttp4s Affected 3.1.0 to before 3.2.11 Fixed in 3.2.11 Patch available CNA
co.fs2:fs2-io (Maven) Vendor— Affected 3.1.0 to before 3.2.11 Fixed in 3.2.11 Patch available GHSA-2cpx-6pqp-wf35
co.fs2:fs2-io_2.12 (Maven) Vendor— Affected 3.1.0 to before 3.2.11 Fixed in 3.2.11 Patch available GHSA-2cpx-6pqp-wf35
co.fs2:fs2-io_3 (Maven) Vendor— Affected 3.1.0 to before 3.2.11 Fixed in 3.2.11 Patch available GHSA-2cpx-6pqp-wf35
co.fs2:fs2-io_2.13 (Maven) Vendor— Affected 3.1.0 to before 3.2.11 Fixed in 3.2.11 Patch available GHSA-2cpx-6pqp-wf35
co.fs2:fs2-io_sjs1_2.13 (Maven) Vendor— Affected 3.1.0 to before 3.2.11 Fixed in 3.2.11 Patch available GHSA-2cpx-6pqp-wf35
co.fs2:fs2-io_sjs1_3 (Maven) Vendor— Affected 3.1.0 to before 3.2.11 Fixed in 3.2.11 Patch available GHSA-2cpx-6pqp-wf35

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:typelevel:fs2::::::::	3.1.0 to before 3.2.11	Vulnerable	http4s

cpe:2.3:a:typelevel:fs2:*:*:*:*:*:*:*:* Versions 3.1.0 to before 3.2.11 Vulnerable ·http4s

Remediation

Fix · CNA fs2 (typelevel) Fixed in 3.2.11
Fix · GHSA-2cpx-6pqp-wf35 co.fs2:fs2-io (Maven) Fixed in 3.2.11 Advisory →
Fix · GHSA-2cpx-6pqp-wf35 co.fs2:fs2-io_2.12 (Maven) Fixed in 3.2.11 Advisory →
Fix · GHSA-2cpx-6pqp-wf35 co.fs2:fs2-io_3 (Maven) Fixed in 3.2.11 Advisory →
Fix · GHSA-2cpx-6pqp-wf35 co.fs2:fs2-io_2.13 (Maven) Fixed in 3.2.11 Advisory →
Fix · GHSA-2cpx-6pqp-wf35 co.fs2:fs2-io_sjs1_2.13 (Maven) Fixed in 3.2.11 Advisory →
Fix · GHSA-2cpx-6pqp-wf35 co.fs2:fs2-io_sjs1_3 (Maven) Fixed in 3.2.11 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2022-31183
2026-10-03 Alias added: GHSA-2cpx-6pqp-wf35

References

Exploit 1

https://github.com/nodejs/node/issues/43994

Patch 1

https://github.com/typelevel/fs2/commit/659824395826a314e0a4331535dbf1ef8bef8207

Advisory 2

Other 3

Sources

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