CWE-347
Improper Verification of Cryptographic Signature
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
CVE-2026-31946 (GCVE-0-2026-31946)
Vulnerability from cvelistv5 – Published: 2026-03-30 20:31 – Updated: 2026-03-31 14:08
VLAI
Title
OpenOLAT: Authentication bypass via forged JWT in OIDC implicit flow
Summary
OpenOlat is an open source web-based e-learning platform for teaching, learning, assessment and communication. From version 10.5.4 to before version 20.2.5, OpenOLAT's OpenID Connect implicit flow implementation does not verify JWT signatures. The JSONWebToken.parse() method silently discards the signature segment of the compact JWT (header.payload.signature), and the getAccessToken() methods in both OpenIdConnectApi and OpenIdConnectFullConfigurableApi only validate claim-level fields (issuer, audience, state, nonce) without any cryptographic signature verification against the Identity Provider's JWKS endpoint. This issue has been patched in version 20.2.5.
Severity
9.8 (Critical)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/OpenOLAT/OpenOLAT/security/adv… | x_refsource_CONFIRM |
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CVE-2026-32294 (GCVE-0-2026-32294)
Vulnerability from cvelistv5 – Published: 2026-03-17 17:19 – Updated: 2026-03-17 18:12
VLAI
Title
JetKVM insufficient firmware verification
Summary
JetKVM prior to 0.5.4 does not verify the authenticity of downloaded firmware files. An attacker-in-the-middle or a compromised update server could modify the firmware and the corresponding SHA256 hash to pass verification.
Severity
CWE
Assigner
References
Impacted products
Date Public
2026-03-17 00:00
Credits
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CVE-2026-32614 (GCVE-0-2026-32614)
Vulnerability from cvelistv5 – Published: 2026-03-13 20:14 – Updated: 2026-03-16 20:12
VLAI
Title
Go ShangMi SM9 Infinity-Point Ciphertext Forgery Vulnerability
Summary
Go ShangMi (Commercial Cryptography) Library (GMSM) is a cryptographic library that covers the Chinese commercial cryptographic public algorithms SM2/SM3/SM4/SM9/ZUC. Prior to 0.41.1, the current SM9 decryption implementation contains an infinity-point ciphertext forgery vulnerability. The root cause is that, during decryption, the elliptic-curve point C1 in the ciphertext is only deserialized and checked to be on the curve, but the implementation does not explicitly reject the point at infinity. In the current implementation, an attacker can construct C1 as the point at infinity, causing the bilinear pairing result to degenerate into the identity element in the GT group. As a result, a critical part of the key derivation input becomes a predictable constant. An attacker who only knows the target user's UID can derive the decryption key material and then forge a ciphertext that passes the integrity check. This vulnerability is fixed in 0.41.1.
Severity
7.5 (High)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/emmansun/gmsm/security/advisor… | x_refsource_CONFIRM |
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CVE-2026-32883 (GCVE-0-2026-32883)
Vulnerability from cvelistv5 – Published: 2026-03-30 20:36 – Updated: 2026-04-02 14:10
VLAI
Title
Botan: Missing OCSP Response Signature Verification Allows MitM Certificate Revocation Bypass
Summary
Botan is a C++ cryptography library. From version 3.0.0 to before version 3.11.0, during X509 path validation, OCSP responses were checked for an appropriate status code, but critically omitted verifying the signature of the OCSP response itself. This issue has been patched in version 3.11.0.
Severity
5.9 (Medium)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/randombit/botan/security/advis… | x_refsource_CONFIRM |
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CVE-2026-32974 (GCVE-0-2026-32974)
Vulnerability from cvelistv5 – Published: 2026-03-29 12:44 – Updated: 2026-04-01 15:32
VLAI
Title
OpenClaw < 2026.3.12 - Forged Event Injection via Feishu Webhook Verification Token
Summary
OpenClaw before 2026.3.12 contains an authentication bypass vulnerability in Feishu webhook mode when only verificationToken is configured without encryptKey, allowing acceptance of forged events. Unauthenticated network attackers can inject forged Feishu events and trigger downstream tool execution by reaching the webhook endpoint.
Severity
8.6 (High)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/openclaw/openclaw/security/adv… | third-party-advisory |
| https://www.vulncheck.com/advisories/openclaw-for… | third-party-advisory |
Impacted products
Date Public
2026-03-13 00:00
Credits
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CVE-2026-33026 (GCVE-0-2026-33026)
Vulnerability from cvelistv5 – Published: 2026-03-30 19:26 – Updated: 2026-03-31 14:17
VLAI
Title
nginx-ui Backup Restore Allows Tampering with Encrypted Backups
Summary
Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui backup restore mechanism allows attackers to tamper with encrypted backup archives and inject malicious configuration during restoration. This issue has been patched in version 2.3.4.
Severity
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/0xJacky/nginx-ui/security/advi… | x_refsource_CONFIRM |
| https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4 | x_refsource_MISC |
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CVE-2026-33117 (GCVE-0-2026-33117)
Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-05-26 16:57
VLAI
Title
Azure SDK for Java Security Feature Bypass Vulnerability
Summary
The Java Key Vault Keys library in the Azure SDK for Java contains an issue in the local cryptographic verification path where authentication tag comparison was implemented incorrectly. In affected applications that use the vulnerable local cryptography path, specially crafted encrypted input may bypass integrity verification checks. Operations delegated to the Key Vault service are not affected. The issue is addressed in version 4.10.6.
Severity
9.1 (Critical)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerabi… | vendor-advisorypatch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Microsoft | Azure SDK for Java |
Affected:
1.0.0 , < 4.10.6
(custom)
|
Date Public
2026-05-12 14:00
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CVE-2026-3338 (GCVE-0-2026-3338)
Vulnerability from cvelistv5 – Published: 2026-03-02 21:22 – Updated: 2026-03-03 14:39
VLAI
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
CWE
- CWE-347 - (Improper Verification of Cryptographic Signature)
Assigner
References
3 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 |
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CVE-2026-33467 (GCVE-0-2026-33467)
Vulnerability from cvelistv5 – Published: 2026-04-28 21:15 – Updated: 2026-04-29 15:10
VLAI
Title
Improper Verification of Cryptographic Signature in Elastic Package Registry Leading to Package Integrity Bypass
Summary
Improper Verification of Cryptographic Signature (CWE-347) in Elastic Package Registry could allow an attacker positioned to intercept network traffic, or to otherwise influence the contents served to a self-hosted registry, to substitute a tampered package without the integrity check failing closed.
Severity
5.9 (Medium)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Elastic | Elastic Package Registry |
Affected:
0.1.0 , ≤ 1.37.0
(semver)
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CVE-2026-33487 (GCVE-0-2026-33487)
Vulnerability from cvelistv5 – Published: 2026-03-26 17:17 – Updated: 2026-03-30 11:16
VLAI
Title
goxmldsig has validateSignature Loop Variable Capture Signature Bypass
Summary
goxmlsig provides XML Digital Signatures implemented in Go. Prior to version 1.6.0, the `validateSignature` function in `validate.go` goes through the references in the `SignedInfo` block to find one that matches the signed element's ID. In Go versions before 1.22, or when `go.mod` uses an older version, there is a loop variable capture issue. The code takes the address of the loop variable `_ref` instead of its value. As a result, if more than one reference matches the ID or if the loop logic is incorrect, the `ref` pointer will always end up pointing to the last element in the `SignedInfo.References` slice after the loop. goxmlsig version 1.6.0 contains a patch.
Severity
7.5 (High)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/russellhaering/goxmldsig/secur… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| russellhaering | goxmldsig |
Affected:
< 1.6.0
|
{
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"content": {
"id": "CVE-2026-33487",
"options": [
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"Exploitation": "poc"
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{
"Automatable": "yes"
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{
"Technical Impact": "partial"
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"role": "CISA Coordinator",
"timestamp": "2026-03-30T11:16:13.379400Z",
"version": "2.0.3"
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"cna": {
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{
"product": "goxmldsig",
"vendor": "russellhaering",
"versions": [
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"version": "\u003c 1.6.0"
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"descriptions": [
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"lang": "en",
"value": "goxmlsig provides XML Digital Signatures implemented in Go. Prior to version 1.6.0, the `validateSignature` function in `validate.go` goes through the references in the `SignedInfo` block to find one that matches the signed element\u0027s ID. In Go versions before 1.22, or when `go.mod` uses an older version, there is a loop variable capture issue. The code takes the address of the loop variable `_ref` instead of its value. As a result, if more than one reference matches the ID or if the loop logic is incorrect, the `ref` pointer will always end up pointing to the last element in the `SignedInfo.References` slice after the loop. goxmlsig version 1.6.0 contains a patch."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
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"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-347",
"description": "CWE-347: Improper Verification of Cryptographic Signature",
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"descriptions": [
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"description": "CWE-682: Incorrect Calculation",
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"providerMetadata": {
"dateUpdated": "2026-03-26T17:17:51.101Z",
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"references": [
{
"name": "https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-479m-364c-43vc",
"tags": [
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"url": "https://github.com/russellhaering/goxmldsig/security/advisories/GHSA-479m-364c-43vc"
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"source": {
"advisory": "GHSA-479m-364c-43vc",
"discovery": "UNKNOWN"
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"title": "goxmldsig has validateSignature Loop Variable Capture Signature Bypass"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-33487",
"datePublished": "2026-03-26T17:17:51.101Z",
"dateReserved": "2026-03-20T16:16:48.971Z",
"dateUpdated": "2026-03-30T11:16:34.970Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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.