Common Weakness Enumeration
CWE-347
AllowedImproper Verification of Cryptographic Signature
Abstraction: Base · Status: Draft
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
1127 vulnerabilities reference this CWE, most recent first.
CVE-2026-4541 (GCVE-0-2026-4541)
Vulnerability from cvelistv5 – Published: 2026-03-22 08:35 – Updated: 2026-04-18 03:39 X_Open Source
VLAI
EPSS
VEX
Title
janmojzis tinyssh Ed25519 Signature crypto_sign_ed25519_tinyssh.c signature verification
Summary
A flaw has been found in janmojzis tinyssh up to 20250501. Impacted is an unknown function of the file tinyssh/crypto_sign_ed25519_tinyssh.c of the component Ed25519 Signature Handler. This manipulation causes improper verification of cryptographic signature. The attack is restricted to local execution. The attack's complexity is rated as high. The exploitability is considered difficult. The exploit has been published and may be used. Upgrading to version 20260301 is recommended to address this issue. Patch name: 9c87269607e0d7d20174df742accc49c042cff17. Upgrading the affected component is recommended.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/352358 | vdb-entry |
| https://vuldb.com/vuln/352358/cti | signaturepermissions-required |
| https://vuldb.com/submit/774687 | third-party-advisory |
| https://github.com/janmojzis/tinyssh/issues/101 | issue-tracking |
| https://github.com/janmojzis/tinyssh/pull/102 | issue-trackingpatch |
| https://github.com/janmojzis/tinyssh/issues/101#i… | exploitissue-tracking |
| https://github.com/janmojzis/tinyssh/commit/9c872… | patch |
| https://github.com/janmojzis/tinyssh/releases/tag… | patch |
| https://github.com/janmojzis/tinyssh/ | product |
Impacted products
Credits
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CVE-2026-4478 (GCVE-0-2026-4478)
Vulnerability from cvelistv5 – Published: 2026-03-20 07:02 – Updated: 2026-03-20 15:09
VLAI
EPSS
VEX
Title
Yi Technology YI Home Camera HTTP Firmware Update ipc signature verification
Summary
A vulnerability was identified in Yi Technology YI Home Camera 2 2.1.1_20171024151200. This impacts an unknown function of the file home/web/ipc of the component HTTP Firmware Update Handler. The manipulation leads to improper verification of cryptographic signature. The attack is possible to be carried out remotely. The complexity of an attack is rather high. The exploitability is said to be difficult. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.351768 | vdb-entry |
| https://vuldb.com/?ctiid.351768 | signaturepermissions-required |
| https://vuldb.com/?submit.773162 | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Yi Technology | YI Home Camera |
Affected:
2 2.1.1_20171024151200
|
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CVE-2026-4115 (GCVE-0-2026-4115)
Vulnerability from cvelistv5 – Published: 2026-03-22 12:15 – Updated: 2026-05-25 01:42 Disputed X_Open Source
VLAI
EPSS
VEX
Title
PuTTY Ed25519 Signature ecc-ssh.c eddsa_verify signature verification
Summary
A vulnerability was detected in PuTTY 0.83. Affected is the function eddsa_verify of the file crypto/ecc-ssh.c of the component Ed25519 Signature Handler. The manipulation results in improper verification of cryptographic signature. The attack may be performed from remote. The attack requires a high level of complexity. The exploitability is told to be difficult. The exploit is now public and may be used. The real existence of this vulnerability is still doubted at the moment. The patch is identified as af996b5ec27ab79bae3882071b9d6acf16044549. It is advisable to implement a patch to correct this issue. The vendor was contacted early, responded in a very professional manner and quickly released a patch for the affected product. However, at the moment there is no proof that this flaw might have any real-world impact.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.352429 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.352429 | signaturepermissions-required |
| https://vuldb.com/?submit.775576 | third-party-advisory |
| https://github.com/py-thok/putty-ed25519-malleabi… | related |
| https://www.chiark.greenend.org.uk/~sgtatham/putt… | related |
| https://github.com/py-thok/putty-ed25519-malleabi… | exploit |
| https://git.tartarus.org/?p=simon/putty.git;a=com… | patch |
| https://www.rfc-editor.org/rfc/rfc8032#section-8.4 | related |
| http://www.openwall.com/lists/oss-security/2026/0… |
Impacted products
Credits
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CVE-2026-3706 (GCVE-0-2026-3706)
Vulnerability from cvelistv5 – Published: 2026-03-08 05:02 – Updated: 2026-04-22 18:54 Disputed X_Open Source
VLAI
EPSS
VEX
Title
mkj Dropbear S Range Check curve25519.c unpackneg signature verification
Summary
A vulnerability was determined in mkj Dropbear up to 2025.89. Impacted is the function unpackneg of the file src/curve25519.c of the component S Range Check. This manipulation causes improper verification of cryptographic signature. The attack can be initiated remotely. The attack is considered to have high complexity. The exploitability is considered difficult. The actual existence of this vulnerability is currently in question. Patch name: fdec3c90a15447bd538641d85e5a3e3ac981011d. To fix this issue, it is recommended to deploy a patch. The project maintainer explains: "Signature Malleability is not exploitable in SSH protocol. (...) [A] PoC doesn't exist for SSH implementation, but rather it's against the internal API."
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.349652 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.349652 | signaturepermissions-required |
| https://vuldb.com/?submit.765933 | third-party-advisory |
| https://github.com/mkj/dropbear/issues/406 | issue-tracking |
| https://github.com/mkj/dropbear/pull/407 | issue-trackingpatch |
| https://github.com/mkj/dropbear/commit/fdec3c90a1… | patch |
| https://github.com/str4d/ed25519-java/issues/82#i… | issue-tracking |
| https://github.com/mkj/dropbear/ | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mkj | Dropbear |
Affected:
2025.0
Affected: 2025.1 Affected: 2025.2 Affected: 2025.3 Affected: 2025.4 Affected: 2025.5 Affected: 2025.6 Affected: 2025.7 Affected: 2025.8 Affected: 2025.9 Affected: 2025.10 Affected: 2025.11 Affected: 2025.12 Affected: 2025.13 Affected: 2025.14 Affected: 2025.15 Affected: 2025.16 Affected: 2025.17 Affected: 2025.18 Affected: 2025.19 Affected: 2025.20 Affected: 2025.21 Affected: 2025.22 Affected: 2025.23 Affected: 2025.24 Affected: 2025.25 Affected: 2025.26 Affected: 2025.27 Affected: 2025.28 Affected: 2025.29 Affected: 2025.30 Affected: 2025.31 Affected: 2025.32 Affected: 2025.33 Affected: 2025.34 Affected: 2025.35 Affected: 2025.36 Affected: 2025.37 Affected: 2025.38 Affected: 2025.39 Affected: 2025.40 Affected: 2025.41 Affected: 2025.42 Affected: 2025.43 Affected: 2025.44 Affected: 2025.45 Affected: 2025.46 Affected: 2025.47 Affected: 2025.48 Affected: 2025.49 Affected: 2025.50 Affected: 2025.51 Affected: 2025.52 Affected: 2025.53 Affected: 2025.54 Affected: 2025.55 Affected: 2025.56 Affected: 2025.57 Affected: 2025.58 Affected: 2025.59 Affected: 2025.60 Affected: 2025.61 Affected: 2025.62 Affected: 2025.63 Affected: 2025.64 Affected: 2025.65 Affected: 2025.66 Affected: 2025.67 Affected: 2025.68 Affected: 2025.69 Affected: 2025.70 Affected: 2025.71 Affected: 2025.72 Affected: 2025.73 Affected: 2025.74 Affected: 2025.75 Affected: 2025.76 Affected: 2025.77 Affected: 2025.78 Affected: 2025.79 Affected: 2025.80 Affected: 2025.81 Affected: 2025.82 Affected: 2025.83 Affected: 2025.84 Affected: 2025.85 Affected: 2025.86 Affected: 2025.87 Affected: 2025.88 Affected: 2025.89 |
Credits
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CVE-2026-3564 (GCVE-0-2026-3564)
Vulnerability from cvelistv5 – Published: 2026-03-17 14:48 – Updated: 2026-07-09 17:20
VLAI
EPSS
VEX
Title
ScreenConnect Instance Level Cryptographic Material Exposure
Summary
A condition in the ScreenConnect server component may allow an actor with access to server-level cryptographic material used for authentication to obtain unauthorized access, including elevated privileges, in certain scenarios. ScreenConnect host and guest client agents are not independently affected by this CVE.
Severity
9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ConnectWise | ScreenConnect |
Affected:
All server versions prior to 26.1
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CVE-2026-3562 (GCVE-0-2026-3562)
Vulnerability from cvelistv5 – Published: 2026-03-13 20:37 – Updated: 2026-03-16 20:21
VLAI
EPSS
VEX
Title
Philips Hue Bridge hk_hap Ed25519 Signature Verification Authentication Bypass Vulnerability
Summary
Philips Hue Bridge hk_hap Ed25519 Signature Verification Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Philips Hue Bridge. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the ed25519_sign_open function. The issue results from improper verification of a cryptographic signature. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-28480.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-… | x_research-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Philips | Hue Bridge |
Affected:
1.73.1973146020
|
Date Public
2026-03-06 21:19
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CVE-2026-3338 (GCVE-0-2026-3338)
Vulnerability from cvelistv5 – Published: 2026-03-02 21:22 – Updated: 2026-07-15 01:06
VLAI
EPSS
VEX
Title
PKCS7_verify Signature Validation Bypass in AWS-LC
Summary
Improper signature validation in PKCS7_verify() in AWS-LC allows an unauthenticated user to bypass signature verification when processing PKCS7 objects with Authenticated Attributes.
Customers of AWS services do not need to take action. Applications using AWS-LC should upgrade to AWS-LC version 1.69.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/aws/aws-lc/releases/tag/v1.69.0 | patch |
| https://github.com/aws/aws-lc/security/advisories… | third-party-advisory |
| https://access.redhat.com/security/cve/CVE-2026-3338 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2444025 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:5459 | vendor-advisoryx_refsource_REDHAT |
Impacted products
8 products
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | AWS-LC |
Affected:
1.41.0 , < 1.69.0
(custom)
|
|
| Red Hat | Red Hat Trusted Artifact Signer 1.3 |
Unaffected:
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cpe:/a:redhat:trusted_artifact_signer:1.3::el9 |
|
| Red Hat | Confidential Compute Attestation |
cpe:/a:redhat:confidential_compute_attestation:1 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4 |
|
| Red Hat | Red Hat OpenShift Update Service |
cpe:/a:redhat:openshift_update_service:5 |
|
| Red Hat | Red Hat Trusted Profile Analyzer |
cpe:/a:redhat:trusted_profile_analyzer:2 |
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CVE-2026-2968 (GCVE-0-2026-2968)
Vulnerability from cvelistv5 – Published: 2026-02-23 03:02 – Updated: 2026-02-23 17:26 X_Open Source
VLAI
EPSS
VEX
Title
Cesanta Mongoose Poly1305 Authentication Tag tls_chacha20.c mg_chacha20_poly1305_decrypt signature verification
Summary
A vulnerability was detected in Cesanta Mongoose up to 7.20. This impacts the function mg_chacha20_poly1305_decrypt of the file /src/tls_chacha20.c of the component Poly1305 Authentication Tag Handler. The manipulation results in improper verification of cryptographic signature. The attack may be launched remotely. This attack is characterized by high complexity. The exploitability is said to be difficult. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.347335 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.347335 | signaturepermissions-required |
| https://vuldb.com/?submit.757091 | third-party-advisory |
| https://github.com/dwBruijn/CVEs/blob/main/Mongoo… | related |
| https://github.com/dwBruijn/CVEs/blob/main/Mongoo… | exploit |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cesanta | Mongoose |
Affected:
7.0
Affected: 7.1 Affected: 7.2 Affected: 7.3 Affected: 7.4 Affected: 7.5 Affected: 7.6 Affected: 7.7 Affected: 7.8 Affected: 7.9 Affected: 7.10 Affected: 7.11 Affected: 7.12 Affected: 7.13 Affected: 7.14 Affected: 7.15 Affected: 7.16 Affected: 7.17 Affected: 7.18 Affected: 7.19 Affected: 7.20 cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:* |
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CVE-2026-2746 (GCVE-0-2026-2746)
Vulnerability from cvelistv5 – Published: 2026-03-04 08:44 – Updated: 2026-03-04 21:26
VLAI
EPSS
VEX
Title
Missing PGP Signature Tag
Summary
SEPPmail Secure Email Gateway before version 15.0.1 does not properly communicate PGP signature verification results, leaving users unable to detect forged emails.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://downloads.seppmail.com/extrelnotes/150/ER… | release-notes |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SEPPmail | Secure Email Gateway |
Affected:
0 , < 15.0.1
(custom)
|
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CVE-2026-2625 (GCVE-0-2026-2625)
Vulnerability from cvelistv5 – Published: 2026-04-03 18:38 – Updated: 2026-07-02 17:13
VLAI
EPSS
VEX
Title
Rust-rpm-sequoia: rust-rpm-sequoia: denial of service via crafted rpm file during signature verification
Summary
A flaw was found in rust-rpm-sequoia. An attacker can exploit this vulnerability by providing a specially crafted Red Hat Package Manager (RPM) file. During the RPM signature verification process, this crafted file can trigger an error in the OpenPGP signature parsing code, leading to an unconditional termination of the rpm process. This issue results in an application level denial of service, making the system unable to process RPM files for signature verification.
Severity
4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:12682 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-2625 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2440357 | issue-trackingx_refsource_REDHAT |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Hardened Images |
Unaffected:
1.10.1.1-1.2.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9 |
Date Public
2026-02-17 12:34
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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.