Common Weakness Enumeration
CWE-303
AllowedIncorrect 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.
167 vulnerabilities reference this CWE, most recent first.
CVE-2026-41053 (GCVE-0-2026-41053)
Vulnerability from cvelistv5 – Published: 2026-06-30 11:38 – Updated: 2026-07-01 03:55
VLAI
EPSS
VEX
Title
Over-inclusive team membership expansion in GitHub App authentication provider for Rancher
Summary
Incorrect authentication caching in the team member ship expansion of the Rancher Github authentication provider caused it granting principal access to any logged in user, in 2.13 before 2.13.6 and 2.14 before 2.14.2.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-30 00:00 UTC
CWE
- CWE-303 - Incorrect implementation of authentication algorithm
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/rancher/rancher/security/advis… | vendor-advisory |
Impacted products
Date Public
2026-05-28 11:31
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CVE-2026-41049 (GCVE-0-2026-41049)
Vulnerability from cvelistv5 – Published: 2026-06-22 15:32 – Updated: 2026-07-08 05:55
VLAI
EPSS
VEX
Title
Caching of Authentication allows Authentication Bypass between users in qSnapper
Summary
Incorrect caching of authentication between different users of the qSnapper dbus service before version 1.3.3 allowed any local attacker to use dbus functions after a privileged users has authenticated for them.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 16:25 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://security.opensuse.org/2026/05/26/qsnapper… | third-party-advisory |
| https://github.com/presire/qSnapper/releases/tag/v1.3.3 | vendor-advisory |
| https://bugzilla.suse.com/show_bug.cgi?id=1262218 | issue-tracking |
Impacted products
Date Public
2026-05-26 15:09
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CVE-2026-41048 (GCVE-0-2026-41048)
Vulnerability from cvelistv5 – Published: 2026-06-22 15:31 – Updated: 2026-07-07 09:31
VLAI
EPSS
VEX
Title
Caching of Authentication allows Authentication Bypass in qSnapper
Summary
Incorrect caching of authentication between different polkit methods in qSnapper before version 1.3.3 allowed a local attacker to use functions like "restore from snapshot" even if only allowed to do "delete snapshot".
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 16:24 UTC
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://security.opensuse.org/2026/05/26/qsnapper… | third-party-advisory |
| https://github.com/presire/qSnapper/releases/tag/v1.3.3 | vendor-advisory |
| https://bugzilla.suse.com/show_bug.cgi?id=1262218 | issue-tracking |
Impacted products
Date Public
2026-05-26 15:09
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CVE-2026-33190 (GCVE-0-2026-33190)
Vulnerability from cvelistv5 – Published: 2026-05-05 19:02 – Updated: 2026-05-06 12:47
VLAI
EPSS
VEX
Title
CoreDNS TSIG authentication bypass on encrypted DNS transports
Summary
CoreDNS is a DNS server that chains plugins. In versions prior to 1.14.3, the tsig plugin can be bypassed on non-plain-DNS transports (DoT, DoH, DoH3, DoQ, and gRPC) because it trusts the transport writer's TsigStatus() instead of performing verification itself. The DoH and DoH3 writer's TsigStatus() always returns nil, the DoT server does not set TsigSecret on the dns.Server, and the DoQ and gRPC writers also unconditionally return nil. This allows an unauthenticated remote client to bypass TSIG-based authentication and access resources intended to be restricted behind a tsig require all policy. Plain DNS over TCP and UDP are not affected. This issue has been fixed in version 1.14.3.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-06 12:46 UTC
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/coredns/coredns/security/advis… | x_refsource_CONFIRM |
| https://github.com/coredns/coredns/releases/tag/v1.14.3 | x_refsource_MISC |
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CVE-2026-32953 (GCVE-0-2026-32953)
Vulnerability from cvelistv5 – Published: 2026-03-20 04:24 – Updated: 2026-03-20 18:08
VLAI
EPSS
VEX
Title
Tillitis: TKey Client has an Error in Protocol Implementation
Summary
Tillitis TKey Client package is a Go package for a TKey client. Versions 1.2.0 and below contain a critical bug in the tkeyclient Go module which causes 1 out of every 256 User Supplied Secrets (USS) to be silently ignored, producing the same Compound Device Identifier (CDI)—and thus the same key material—as if no USS is provided. This happens because a buffer index error overwrites the USS-enabled boolean with the first byte of the USS digest, so any USS whose hash starts with 0x00 is effectively discarded. This issue has been fixed in version 1.3.0. Users unable to upgrade immediately should switch to a USS whose hash does not begin with a zero byte.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-20 16:34 UTC
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/tillitis/tkeyclient/security/a… | x_refsource_CONFIRM |
| https://github.com/tillitis/tkeyclient/commit/495… | x_refsource_MISC |
| https://github.com/tillitis/tkeyclient/releases/t… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| tillitis | tkeyclient |
Affected:
< 1.3.0
|
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CVE-2026-29515 (GCVE-0-2026-29515)
Vulnerability from cvelistv5 – Published: 2026-03-11 03:23 – Updated: 2026-07-28 01:48 Unsupported When Assigned
VLAI
EPSS
VEX
Title
MiCode FileExplorer SwiFTP Server Authentication Bypass
Summary
MiCode FileExplorer contains an authentication bypass vulnerability in the embedded SwiFTP FTP server component that allows network attackers to log in without valid credentials. Attackers can send arbitrary username and password combinations to the PASS command handler, which unconditionally grants access and allows listing, reading, writing, and deleting files exposed by the FTP server. The MiCode/Explorer open source project has reached end-of-life status.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-11 15:38 UTC
CWE
- CWE-303 - Incorrect implementation of authentication algorithm
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/MiCode/FileExplorer | product |
| https://www.vulncheck.com/advisories/micode-filee… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| MiCode | FileExplorer |
Affected:
0
cpe:2.3:a:file_explorer_project:file_explorer:0:*:*:*:*:ipados:*:* |
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CVE-2026-27656 (GCVE-0-2026-27656)
Vulnerability from cvelistv5 – Published: 2026-03-25 16:28 – Updated: 2026-03-26 13:19
VLAI
EPSS
VEX
Title
Account Takeover via Substring Matching in OpenID Connect Authentication
Summary
Mattermost versions 11.4.x <= 11.4.0, 11.3.x <= 11.3.1, 11.2.x <= 11.2.3, 10.11.x <= 10.11.11 fail to properly validate user identity in the OpenID {{IsSameUser()}} comparison logic, which allows an attacker to take over arbitrary user accounts via an overly permissive substring matching flaw in the user discovery flow.. Mattermost Advisory ID: MMSA-2026-00590
Severity
5.7 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-26 03:55 UTC
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://mattermost.com/security-updates | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mattermost | Mattermost |
Affected:
11.4.0 , ≤ 11.4.0
(semver)
Affected: 11.3.0 , ≤ 11.3.1 (semver) Affected: 11.2.0 , ≤ 11.2.3 (semver) Affected: 10.11.0 , ≤ 10.11.11 (semver) Unaffected: 11.5.0 Unaffected: 11.4.1 Unaffected: 11.3.2 Unaffected: 11.2.4 Unaffected: 10.11.12 |
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CVE-2026-11430 (GCVE-0-2026-11430)
Vulnerability from cvelistv5 – Published: 2026-08-07 19:02 – Updated: 2026-08-13 18:13
VLAI
EPSS
VEX
Title
Grav CMS Scheduler Webhook Authentication Bypass via Null Short-Circuit
Summary
Grav CMS's scheduler-webhook plugin contains an authentication bypass in the webhook token check. When the webhook feature is enabled but no webhookToken is configured, a compound conditional short-circuits and skips token validation, so an unauthenticated remote attacker who can reach POST /scheduler/webhook can trigger the operator's already-configured scheduled jobs by sending a single request. The primitive is triggering-existing-jobs, not attacker-chosen command execution: the attacker controls when the jobs run and which one runs (via ?job=), but does not control what the jobs do. Code execution follows only when the operator has configured a job that shells out, and even then the attacker controls timing rather than payload. Not a default-install issue: reaching the endpoint requires the separate scheduler-webhook GPM plugin to be installed, scheduler.modern.webhook.enabled to be true (default false), and no webhookToken to be configured; a stock Grav or Grav-Admin install exposes nothing here.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 20:56 UTC
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/getgrav/grav/security/advisori… | technical-description |
| https://github.com/getgrav/grav | product |
| https://github.com/getgrav/grav/commit/694f1dae06… | patch |
| https://www.vulncheck.com/advisories/grav-cms-sch… | third-party-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Trilby Media | grav-plugin-scheduler-webhook |
Affected:
0 , < 1.1.3
(semver)
|
|
| Trilby Media | getgrav/grav |
Affected:
0 , < 2.0.9
(semver)
|
Date Public
2026-08-07 00:00
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CVE-2026-10050 (GCVE-0-2026-10050)
Vulnerability from cvelistv5 – Published: 2026-08-04 11:02 – Updated: 2026-08-04 12:46
VLAI
EPSS
VEX
Title
Digest authentication lossy encoding
Summary
In Eclipse Jetty, the Digest authentication server-side component uses ISO-8859-1 to encode the password as bytes.
This was done because the initial specification for HTTP did not specify explicitly a charset, and it was assumed to be ISO-8859-1 for historical reasons.
If the password contains characters that cannot be represented in ISO-8859-1, they are silently replaced by `?`. This happens with passwords that contain Chinese, Cyrillic or Greek characters, for example: `αβ123` converts to `??123`.
An attacker can send a request with a digest `Authorization` header crafted with a password made of only `?` characters; the server would match any password of the same length that contains non-ISO-8859-1 characters.
Recent HTTP Digest [RFC-7616](https://datatracker.ietf.org/doc/html/rfc7616) supports a `charset` parameters that defaults to UTF-8 that allows for correct encoding/decoding of passwords.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 12:45 UTC
Assigner
References
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse Jetty - EE8 |
Affected:
12.0.0 , ≤ 12.0.35
(semver)
Affected: 12.1.0 , ≤ 12.1.9 (semver) |
|
| Eclipse Foundation | Eclipse Jetty - EE9 |
Affected:
12.0.0 , ≤ 12.0.35
(semver)
Affected: 12.1.0 , ≤ 12.1.9 (semver) |
|
| Eclipse Foundation | Eclipse Jetty |
Affected:
9.4.0 , ≤ 9.4.62
(semver)
Affected: 10.0.0 , ≤ 10.0.30 (semver) Affected: 11.0.0 , ≤ 11.0.30 (semver) Affected: 12.0.0 , ≤ 12.0.35 (semver) Affected: 12.1.0 , ≤ 12.1.9 (semver) |
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CVE-2026-8922 (GCVE-0-2026-8922)
Vulnerability from cvelistv5 – Published: 2026-05-19 06:27 – Updated: 2026-06-26 06:46
VLAI
EPSS
VEX
Title
Org.keycloak/keycloak-services: keycloak: org.keycloak.protocol.oidc: security flaw in org.keycloak/keycloak-services
Summary
A flaw was found in Keycloak. When both realm-level and client-level `notBefore` revocation policies are configured, Keycloak's OpenID Connect (OIDC) Introspection feature fails to properly honor the realm-level policy. This allows tokens that should have been revoked to remain active, potentially leading to unauthorized access or continued session validity. This could impact the security of systems utilizing Keycloak for identity and access management.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-19 12:53 UTC
CWE
- CWE-303 - Incorrect Implementation of Authentication Algorithm
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:25097 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:25098 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:30049 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:30050 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-8922 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2479586 | issue-trackingx_refsource_REDHAT |
Impacted products
6 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4.13-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4 |
Unaffected:
26.4-19 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.4::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.4.13 |
cpe:/a:redhat:build_keycloak:26.4::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.6 |
Unaffected:
26.6.3-3 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.6::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.6 |
Unaffected:
26.6-6 , < *
(rpm)
cpe:/a:redhat:build_keycloak:26.6::el9 |
|
| Red Hat | Red Hat build of Keycloak 26.6.3 |
cpe:/a:redhat:build_keycloak:26.6::el9
|
Date Public
2026-05-19 06:22
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"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_redhatCweChain": "CWE-303: Incorrect Implementation of Authentication Algorithm"
}
},
"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"assignerShortName": "redhat",
"cveId": "CVE-2026-8922",
"datePublished": "2026-05-19T06:27:35.781Z",
"dateReserved": "2026-05-19T06:07:42.943Z",
"dateUpdated": "2026-06-26T06:46:19.583Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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.