CVE-2022-48195Network attack vector

Authentication weakening via empty SCRAM nonce

Published Dec 31, 2022 · Updated Apr 11, 2025

Improper authentication in Mellium mellium.im/sasl before 0.3.1 allows remote attackers to weaken SCRAM authentication via an empty nonce. The SCRAM authentication path uses an empty nonce instead of generating a random value when the remote peer advertises channel binding. A server that validates nonce length rejects the exchange; exposure requires a peer that accepts the empty nonce, weakening authentication randomness.

CVSS severity9.8
Critical
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in Mellium mellium.im/sasl before 0.3.1 allows remote attackers to weaken SCRAM authentication via an empty nonce. The SCRAM authentication path uses an empty nonce instead of generating a random value when the remote peer advertises channel binding. A server that validates nonce length rejects the exchange; exposure requires a peer that accepts the empty nonce, weakening authentication randomness.

The record

CVE
CVE-2022-48195
Published
Dec 31, 2022
Updated
Apr 11, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-287
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 31, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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