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Common Weakness Enumeration

CWE-347

Allowed

Improper Verification of Cryptographic Signature

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

1328 vulnerabilities reference this CWE, most recent first.

CVE-2026-68757 (GCVE-0-2026-68757)

Vulnerability from cvelistv5 – Published: 2026-08-12 15:10 – Updated: 2026-08-12 19:01
VLAI
Title
Potential improper SAML signature verification in JFrog Artifactory
Summary
A user with access to a valid SAML response may impersonate another user under specific conditions.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 19:01 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
jfrog artifactory Affected: 0 , < 7.146.35 (custom)
Affected: 7.161.0 , < 7.161.16 (custom)
Create a notification for this product.
Credits
Ben Morris in collaboration with Claude and Anthropic Research
Show details on NVD website
To clipboard 

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CVE-2026-68745 (GCVE-0-2026-68745)

Vulnerability from cvelistv5 – Published: 2026-08-21 08:21 – Updated: 2026-08-24 16:58
VLAI
Title
Apache CloudStack: SAML2 Signature Validation Silently Skipped for Cert-less IdP
Summary
Certificate validation failures in SAML authentication in Apache CloudStack 4.20.3.0 and 4.22.1.0 on all platforms allow a malicious agent to forge a SAML response to the management server. The agent will have to spoof the ip address of the IdP or get an url of its own choosing registered in the management server, after which it can allow logging on with forged signatures. Users are recommended to upgrade to versions 4.20.3.1 or 4.22.1.1 and above, which fix this issue.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-24 16:58 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache CloudStack Affected: 4.5.2 , ≤ 4.20.3.0 (semver)
Affected: 4.21.0.0 , ≤ 4.22.1.0 (semver)
Create a notification for this product.
Credits
Katriel Moses <katriel.moses@gmail.com>
Show details on NVD website
To clipboard 

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CVE-2026-67278 (GCVE-0-2026-67278)

Vulnerability from cvelistv5 – Published: 2026-09-05 20:00 – Updated: 2026-09-08 15:30
VLAI
Title
TLS server impersonation possible in Mikrotik RouterOS
Summary
MikroTik RouterOS accepts malformed RSA/PKCS#1 v1.5 signatures during X.509 validation. Because its trust store includes an e=3 root CA, an attacker controlling or redirecting an outbound RouterOS TLS connection can use the root’s public certificate - without its private key - to forge a trusted intermediate and issue certificates for arbitrary hostnames, enabling TLS server impersonation. This issue affects only 7.x branch was fixed in versions: 7.23.4 (Long-term) and 7.24.2 (Stable)
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 15:30 UTC
CWE
  • CWE-347 - Improper verification of cryptographic signature
Assigner
References
Impacted products
Vendor Product Version
Mikrotik RouterOS Affected: 7.24 , < 7.24.2 (custom)
Affected: 7.0.0 , < 7.23.4 (custom)
    cpe:2.3:a:mikrotik:routeros:*:*:*:*:*:*:*:*
    cpe:2.3:a:mikrotik:routeros:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-05 00:00
Credits
Sławomir Rozbicki (CERT.PL)
Show details on NVD website
To clipboard 

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CVE-2026-67276 (GCVE-0-2026-67276)

Vulnerability from cvelistv5 – Published: 2026-09-05 20:00 – Updated: 2026-09-09 04:26
VLAI
Title
SSH user impersonation possible in Mikrotik RouterOS
Summary
RouterOS does not compare the complete RSA public key when matching an SSH authentication request to an authorized user key, checking the key type and modulus but omitting the exponent. Because signature verification uses the client-supplied key, an attacker knowing an authorized RSA modulus can supply a key with exponent one, forge a valid signature, and open an SSH command channel as the target user without the private key.This issue affects only 7.x branch was fixed in versions: 7.23.4 (Long-term) and 7.24.2 (Stable)
Severity
9.2 (Critical)
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 00:00 UTC
CWE
  • CWE-347 - Improper verification of cryptographic signature
Assigner
References
Impacted products
Vendor Product Version
Mikrotik RouterOS Affected: 7.24 , < 7.24.2 (custom)
Affected: 7.9 , < 7.23.4 (custom)
    cpe:2.3:a:mikrotik:routeros:*:*:*:*:*:*:*:*
    cpe:2.3:a:mikrotik:routeros:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-09-05 00:00
Credits
Sławomir Rozbicki (CERT.PL)
Show details on NVD website
To clipboard 

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CVE-2026-66776 (GCVE-0-2026-66776)

Vulnerability from cvelistv5 – Published: 2026-08-11 00:19 – Updated: 2026-08-11 14:27
VLAI
Title
Multiple vulnerabilities in SAP Business AI Platform (Approuter)
Summary
SAP Approuter does not consistently enforce integrity verification on certain session-related request headers under specific conditions. An attacker with low privileges could send a specially crafted request that bypasses the integrity check and loads another user's session context. Successful exploitation requires the attacker to have previously observed matching session values out-of-band, which makes the attack complex to execute. This could result in a high impact on confidentiality and a low impact on integrity. There is no impact on availability.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-11 13:16 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
SAP_SE SAP Business AI Platform (Approuter) Affected: SAP Approuter node.js package < 23.0.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-65616 (GCVE-0-2026-65616)

Vulnerability from cvelistv5 – Published: 2026-07-27 19:34 – Updated: 2026-07-27 20:05
VLAI
Title
Potential privilege escalation to JFrog administrator privileges
Summary
Incorrect authorization validation in refresh token signature allows non-admin users to obtain a signed JFrog administrator token.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-27 20:05 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
jfrog artifactory Affected: 0 , < 7.146.27 (custom)
Create a notification for this product.
Credits
Kostya Kortchinsky | OpenAI
Show details on NVD website
To clipboard 

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CVE-2026-64623 (GCVE-0-2026-64623)

Vulnerability from cvelistv5 – Published: 2026-07-20 12:04 – Updated: 2026-08-14 16:50
VLAI
Title
Network-AI before 5.13.4 Cryptographic Signature Verification Bypass
Summary
Network-AI before 5.13.4 contains an improper cryptographic signature verification vulnerability in APSAdapter where the default local verifier accepts any non-empty string as valid. Unauthenticated attackers can submit forged APS delegation payloads with arbitrary scopes to bypass signature verification and obtain signed permission-grant tokens for sensitive resources including SHELL_EXEC.
Severity
8.8 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 13:48 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
Jovancoding Network-AI Affected: 0 , < 5.13.4 (semver)
Unaffected: 5.13.4 (semver)
    cpe:2.3:a:network-ai:network-ai:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-07-05 00:00
Credits
EQSTLab useworld
Show details on NVD website
To clipboard 

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CVE-2026-62918 (GCVE-0-2026-62918)

Vulnerability from cvelistv5 – Published: 2026-08-06 22:37 – Updated: 2026-09-14 17:10 Exclusively Hosted Service
VLAI
Title
Microsoft Teams Spoofing Vulnerability
Summary
Improper verification of cryptographic signature in Microsoft Teams allows an unauthorized attacker to perform spoofing over a network.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-07 00:59 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
Microsoft Microsoft Teams Affected: -
    cpe:2.3:a:microsoft:teams:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-06 14:00
Show details on NVD website
To clipboard 

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CVE-2026-62873 (GCVE-0-2026-62873)

Vulnerability from cvelistv5 – Published: 2026-08-06 22:37 – Updated: 2026-09-14 17:10 Exclusively Hosted Service
VLAI
Title
Microsoft 365 Admin Center Elevation of Privilege Vulnerability
Summary
Improper verification of cryptographic signature in Microsoft 365 Admin Center allows an unauthorized attacker to elevate privileges over a network.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-06 00:00 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
Microsoft Microsoft 365 Admin Center Affected: -
    cpe:2.3:a:microsoft:365_admin_center:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-06 14:00
Show details on NVD website
To clipboard 

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CVE-2026-62834 (GCVE-0-2026-62834)

Vulnerability from cvelistv5 – Published: 2026-08-20 21:43 – Updated: 2026-09-14 17:10 Exclusively Hosted Service
VLAI
Title
Azure Data Factory Elevation of Privilege Vulnerability
Summary
Improper verification of cryptographic signature in Azure Data Factory allows an unauthorized attacker to elevate privileges over a network.
Severity
9.3 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 00:00 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
Impacted products
Vendor Product Version
Microsoft Azure Data Factory Affected: -
    cpe:2.3:a:microsoft:azure_data_factory:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-08-20 14:00
Show details on NVD website
To clipboard 

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No mitigation information available for this CWE.

CAPEC-463: Padding Oracle Crypto Attack

An adversary is able to efficiently decrypt data without knowing the decryption key if a target system leaks data on whether or not a padding error happened while decrypting the ciphertext. A target system that leaks this type of information becomes the padding oracle and an adversary is able to make use of that oracle to efficiently decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). In addition to performing decryption, an adversary is also able to produce valid ciphertexts (i.e., perform encryption) by using the padding oracle, all without knowing the encryption key.

CAPEC-475: Signature Spoofing by Improper Validation

An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.

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