Common Weakness Enumeration

CWE-303

Allowed

Incorrect Implementation of Authentication Algorithm

Abstraction: Base · Status: Draft

The requirements for the product dictate the use of an established authentication algorithm, but the implementation of the algorithm is incorrect.

199 vulnerabilities reference this CWE, most recent first.

CVE-2026-107279 (GCVE-0-2026-107279)

Vulnerability from cvelistv5 – Published: 2026-10-07 21:10 – Updated: 2026-10-08 15:02
VLAI
Title
AsyncHttpClient: Digest mutual authentication is switched off by a peer offering qop=auth-int
Summary
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. In 3.0.12, a peer offering only Digest qop=auth-int causes mutual-authentication verification to be skipped. AuthenticatorUtils.computeExpectedRspAuth returns no expected value for auth-int, and Interceptors treats that result as unverifiable but nonfatal, so a response with an invalid rspauth value is accepted. A peer that does not know the shared secret can therefore be accepted as the authenticated server. This issue is fixed in version 3.0.13.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-08 14:58 UTC
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
  • CWE-757 - Selection of Less-Secure Algorithm During Negotiation ('Algorithm Downgrade')
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7712 records in the last 180 days details
Impacted products
Show details on NVD website

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CVE-2026-104939 (GCVE-0-2026-104939)

Vulnerability from cvelistv5 – Published: 2026-10-14 14:40 – Updated: 2026-10-15 16:43
VLAI
Title
NGINX Ingress Controller vulnerability
Summary
Description NGINX Ingress Controller has a vulnerability when implementing an externalAuth policy for ingress. NGINX Ingress Controller may mishandle the HTTP response from an OAuth IdP and allow an attacker to acquire unauthenticated access to protected paths before the proper external authentication can happen. Impact This vulnerability may allow remote attackers unauthenticated access to protected paths. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 15:54 UTC
CWE
Assigner
f5 CNA under the mitre root
CNA scorecard B 84/100 over 87 records in the last 180 days details
References
Impacted products
Vendor Product Version
F5 NGINX Ingress Controller Affected: 5.6.0 , < 5.7.0 (custom)
Create a notification for this product.
Date Public
2023-01-01 00:00
Show details on NVD website

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CVE-2026-101878 (GCVE-0-2026-101878)

Vulnerability from cvelistv5 – Published: 2026-09-29 01:58 – Updated: 2026-10-01 19:19 X_Open Source
VLAI
Title
Bitwarden Server 2025.6.0 < 2025.6.0 Authentication Bypass via SSO Identifier Truncation
Summary
Bitwarden Server 2025.6.0 before 2026.5.0 declares the @ExternalId parameter of the User_ReadBySsoUserOrganizationIdExternalId stored procedure as NVARCHAR(50) while the column it queries stores NVARCHAR(300), silently truncating the SSO login identifier on SQL Server deployments and allowing a user whose identity-provider identifier begins with another organization member's full 50-character identifier to authenticate as that member and obtain a victim-scoped access token.
SSVC
Exploitation: poc Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-29 17:21 UTC
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 6249 records in the last 180 days details
Impacted products
Vendor Product Version
bitwarden bitwarden server Affected: 2025.6.0 , < 2026.5.0 (custom)
    cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-04-29 00:00
Show details on NVD website

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CVE-2026-97720 (GCVE-0-2026-97720)

Vulnerability from cvelistv5 – Published: 2026-10-07 08:46 – Updated: 2026-10-07 18:47
VLAI
Title
Apache Impala: Impala Executor Webserver Auth Bypass
Summary
Incorrect implementation of JWT/OAuth authentication in Impala executors in Apache Impala versions up to and including 4.5.2 which allows attacked to access resources served by the executor's webserver when that webserver is configured to accept JWT/OAuth tokens.  Bearer token (JWT) signatures are not validated resulting in the webserver accepting any valid JWT. Users are recommended to either disable JWT/OAuth auth for Impala executors or upgrade to version 4.5.3, which fixes this issue.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-07 18:47 UTC
CWE
  • CWE-303 - Incorrect implementation of authentication algorithm
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 934 records in the last 180 days details
Impacted products
Vendor Product Version
Apache Software Foundation Apache Impala Affected: 4.1.0 , ≤ 4.5.2 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-93394 (GCVE-0-2026-93394)

Vulnerability from cvelistv5 – Published: 2026-09-17 20:31 – Updated: 2026-09-18 14:31
VLAI
Title
libmongoc SCRAM client nonce-validation bypass
Summary
A flaw in libmongoc's SCRAM authentication implementation caused the client to continue the authentication handshake and transmit the client proof even when a nonce mismatch was detected in the server's first message. An unauthorized party with a man-in-the-middle position could exploit this by injecting a crafted server-first-message containing a controlled salt and low iteration count, then capturing the resulting client proof to perform offline password cracking. This vulnerability is mitigated by TLS, which is standard in production deployments.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 14:27 UTC
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
mongodb CNA under the mitre root
CNA scorecard C 70/100 over 204 records in the last 180 days details
References
Impacted products
Vendor Product Version
MongoDB Inc. C Driver Affected: 2.0.0 , < 2.3.2 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-92873 (GCVE-0-2026-92873)

Vulnerability from cvelistv5 – Published: 2026-09-30 07:51 – Updated: 2026-09-30 16:58
VLAI
Summary
Pgpool-II contains an incorrect implementation of an authentication algorithm, which may allow an unauthenticated attacker to promote an arbitrary watchdog node to the leader node.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 16:58 UTC
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
jpcert CNA under the jpcert root
CNA scorecard C 64/100 over 190 records in the last 180 days details
Impacted products
Vendor Product Version
Pgpool Global Development Group Pgpool-II Affected: 4.7.0 , ≤ 4.7.2 (semver)
Affected: 4.6.0 , ≤ 4.6.7 (semver)
Affected: 4.5.0 , ≤ 4.5.12 (semver)
Affected: 4.4.0 , ≤ 4.4.17 (semver)
Affected: 4.3.0 , ≤ 4.3.20 (semver)
Affected: 3.5.x , ≤ 4.2.x (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-89077 (GCVE-0-2026-89077)

Vulnerability from cvelistv5 – Published: 2026-10-14 15:16 – Updated: 2026-10-15 03:56
VLAI
Title
MOVEit Transfer Identity validation flaw in SFTP authentication
Summary
Incorrect implementation of authentication algorithm vulnerability in Progress MOVEit Transfer (SFTP module). This issue affects MOVEit Transfer: before 2025.1.6 and from 2026.0.0 before 2026.0.4.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-14 00:00 UTC
CWE
  • CWE-303 - Incorrect implementation of authentication algorithm
Assigner
ProgressSoftware CNA under the mitre root
CNA scorecard B 78/100 over 147 records in the last 180 days details
References
Impacted products
Vendor Product Version
Progress MOVEit Transfer Affected: 0 , < 2025.1.6 (semver)
Affected: 2026.0.0 , < 2026.0.4 (semver)
Create a notification for this product.
Date Public
2026-10-14 15:00
Show details on NVD website

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CVE-2026-85972 (GCVE-0-2026-85972)

Vulnerability from cvelistv5 – Published: 2026-10-12 16:41 – Updated: 2026-10-14 10:51
VLAI
Title
Improper Kerberos server verification in Progress MarkLogic Server
Summary
Progress MarkLogic Server 12.x releases before 12.1.0 and 11.x releases before 11.3.7 do not sufficiently verify the identity of a Kerberos authentication service in certain password-based authentication configurations. A network-positioned attacker could impersonate trusted authentication infrastructure, potentially resulting in unauthorized access or modification of protected data.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-14 03:59 UTC
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
ProgressSoftware CNA under the mitre root
CNA scorecard B 78/100 over 147 records in the last 180 days details
References
Impacted products
Vendor Product Version
Progress Software Corporation MarkLogic Server Affected: 11.0.0 , < 11.3.7 (custom)
Affected: 12.0.0 , < 12.1.0 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2026-83906 (GCVE-0-2026-83906)

Vulnerability from cvelistv5 – Published: 2026-10-13 18:59 – Updated: 2026-10-15 22:22
VLAI
Title
Windows Shell Spoofing Vulnerability
Summary
Incorrect implementation of authentication algorithm in Windows Shell allows an unauthorized attacker to perform spoofing over a network.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 22:17 UTC
CWE
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
microsoft CNA under the mitre root
CNA scorecard B 82/100 over 3955 records in the last 180 days details
References
Impacted products
Vendor Product Version
Microsoft Windows 11 version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7652 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 23H2 Affected: 10.0.22631.0 , < 10.0.22631.7652 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 24H2 Affected: 10.0.26100.0 , < 10.0.26100.9711 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 25H2 Affected: 10.0.26200.0 , < 10.0.26200.9711 (custom)
Create a notification for this product.
Microsoft Windows 11 version 26H1 Affected: 10.0.28000.0 , < 10.0.28000.3231 (custom)
Create a notification for this product.
Microsoft Windows 11 Version 26H2 Affected: 10.0.26300.0 , < 10.0.26300.9711 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 Affected: 10.0.26100.0 , < 10.0.26100.33650 (custom)
Create a notification for this product.
Microsoft Windows Server 2025 (Server Core installation) Affected: 10.0.26100.0 , < 10.0.26100.33650 (custom)
Create a notification for this product.
Date Public
2026-10-13 14:00
Show details on NVD website

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CVE-2026-77244 (GCVE-0-2026-77244)

Vulnerability from cvelistv5 – Published: 2026-09-22 17:49 – Updated: 2026-09-23 14:38
VLAI
Title
[mcp-atlassian] Authentication bypass in HTTP transport: AtlassianOpaqueTokenVerifier accepts any non-empty token
Summary
MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the HTTP transport accepts requests without a verified user identity and downstream fetcher construction falls back to the operator's globally configured Jira or Confluence credentials. A network client that can reach the MCP endpoint can invoke Atlassian tools as the operator, including read and write operations available to that account. The advisory traces the vulnerable input and processing flow through UserTokenMiddleware, AtlassianOpaqueTokenVerifier, _get_fetcher, and streamable-http, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 18:55 UTC
CWE
  • CWE-287 - Improper Authentication
  • CWE-303 - Incorrect Implementation of Authentication Algorithm
  • CWE-862 - Missing Authorization
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7712 records in the last 180 days details
Impacted products
Vendor Product Version
sooperset mcp-atlassian Affected: < 0.22.0
Create a notification for this product.
Show details on NVD website

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No mitigation information available for this CWE.

CAPEC-90: Reflection Attack in Authentication Protocol

An adversary can abuse an authentication protocol susceptible to reflection attack in order to defeat it. Doing so allows the adversary illegitimate access to the target system, without possessing the requisite credentials. Reflection attacks are of great concern to authentication protocols that rely on a challenge-handshake or similar mechanism. An adversary can impersonate a legitimate user and can gain illegitimate access to the system by successfully mounting a reflection attack during authentication.