CVE-2022-41912Public exploitNetwork attack vector

Authentication bypass via mismatched Assertion signature validation

Published Nov 28, 2022 · Updated Apr 23, 2025

Improper authentication in CrewJam SAML before 0.4.9 allows remote attackers to bypass SAML login with multiple Assertion elements. The parser unmarshals one Assertion for authentication data while signature validation can succeed against a different Assertion in the same response. An unauthenticated attacker who can submit a crafted SAML response can impersonate a federated identity and obtain its application access.

CVSS severity9.1
Critical
EPSS probability2.24%
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 CrewJam SAML before 0.4.9 allows remote attackers to bypass SAML login with multiple Assertion elements. The parser unmarshals one Assertion for authentication data while signature validation can succeed against a different Assertion in the same response. An unauthenticated attacker who can submit a crafted SAML response can impersonate a federated identity and obtain its application access.

The record

CVE
CVE-2022-41912
Published
Nov 28, 2022
Updated
Apr 23, 2025
Vendor
CrewJam
Product
SAML
Classifications
CWE-287, T1606.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.4.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CrewJam · SAMLversion=< 0.4.9

Published CVSS scores

9.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-287Improper Authentication
T1606.002Forge Web Credentials: SAML Tokens

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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