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.
1516 vulnerabilities reference this CWE, most recent first.
CVE-2026-118040 (GCVE-0-2026-118040)
Vulnerability from cvelistv5 – Published: 2026-10-28 12:30 – Updated: 2026-10-28 12:30
VLAI
EPSS
VEX
Title
Improper Signature and Certificate Validation in Telerik Document Processing Libraries RadPdfProcessing
Summary
In Progress® Telerik® Document Processing Libraries prior to version 2026.3.1027, improper verification of cryptographic signatures and improper certificate validation in RadPdfProcessing digital signature validation allow an unauthenticated attacker to cause signature validation to report forged content as unmodified and its signing certificate as valid via a crafted signed PDF document.
Severity
7.5 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://docs.telerik.com/devtools/document-proces… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Progress Software | Telerik Document Processing Libraries |
Affected:
0 , < 2026.3.1027
(custom)
|
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CVE-2026-117602 (GCVE-0-2026-117602)
Vulnerability from cvelistv5 – Published: 2026-10-27 13:09 – Updated: 2026-10-27 13:09
VLAI
EPSS
VEX
Title
Electrum before 4.7.2 External Plugin Authorization Bypass Local Code Execution
Summary
Electrum 4.6.0 before 4.7.2 contains an authorization bypass in the external plugin loader, which executes a plugin's __init__.py module when the plugin is marked enabled in the config file, without verifying its plugin-password signature. A rogue local process with write access to the Electrum data directory can place plugin code in the plugins/ folder and mark it enabled, causing arbitrary code execution inside the Electrum process.
Severity
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/spesmilo/electrum/security/adv… | vendor-advisory |
| https://github.com/spesmilo/electrum/commit/032df… | patch |
| https://github.com/spesmilo/electrum/commit/fd716… | patch |
| https://www.vulncheck.com/advisories/electrum-bef… | third-party-advisory |
Impacted products
Date Public
2026-04-28 00:00
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CVE-2026-117601 (GCVE-0-2026-117601)
Vulnerability from cvelistv5 – Published: 2026-10-27 13:09 – Updated: 2026-10-28 16:16
VLAI
EPSS
VEX
Title
Electrum before 4.8.3 Missing Signature Verification of Mempool Transactions
Summary
Electrum before 4.8.3 fails to verify signatures of wallet-owned inputs in unconfirmed mempool transactions, allowing malicious servers to replace a just-broadcast transaction with a conflicting one. Attackers can swallow the user's transaction and display an invalid zero-fee copy paying an attacker address, tricking users into RBF fee-bumping and signing it.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 15:56 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/spesmilo/electrum/security/adv… | vendor-advisory |
| https://github.com/spesmilo/electrum/commit/90fe3… | patch |
| https://www.vulncheck.com/advisories/electrum-bef… | third-party-advisory |
Impacted products
Date Public
2026-10-24 00:00
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CVE-2026-116189 (GCVE-0-2026-116189)
Vulnerability from cvelistv5 – Published: 2026-10-25 13:20 – Updated: 2026-10-25 13:20
VLAI
EPSS
VEX
Title
rclone 1.55.0 before 1.75.2 selfupdate Signature Verification Bypass via SHA256SUMS
Summary
rclone from 1.55.0 before 1.75.2 contains a signature verification bypass in stable selfupdate that trusts checksums from unsigned bytes preceding the PGP-clearsigned SHA256SUMS block. Attackers controlling the release distribution path can prepend an unsigned checksum line matching a malicious archive, causing selfupdate to install an attacker-controlled rclone executable.
Severity
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/rclone/rclone/security/advisor… | vendor-advisory |
| https://www.vulncheck.com/advisories/rclone-1.55.… | third-party-advisory |
Impacted products
Date Public
2026-10-09 00:00
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CVE-2026-116116 (GCVE-0-2026-116116)
Vulnerability from cvelistv5 – Published: 2026-10-26 04:00 – Updated: 2026-10-26 04:00
VLAI
EPSS
VEX
Title
Yoosee GM8135S Camera Secure Boot signature verification
Summary
A vulnerability was detected in Yoosee GM8135S Camera 21.00.01.36. Affected is an unknown function of the component Secure Boot. Performing a manipulation results in improper verification of cryptographic signature. The attack needs to be approached locally. 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
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://vuldb.com/vuln/426184 | vdb-entry |
| https://vuldb.com/vuln/426184/cti | signaturepermissions-required |
| https://vuldb.com/cve/CVE-2026-116116 | third-party-advisory |
| https://vuldb.com/submit/1004712 | third-party-advisory |
| https://akosibrylle.me/writeups/yoosee-cve | exploit |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Yoosee | GM8135S Camera |
Affected:
21.00.01.36
cpe:2.3:a:yoosee:gm8135s_camera:*:*:*:*:*:*:*:* |
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CVE-2026-115374 (GCVE-0-2026-115374)
Vulnerability from cvelistv5 – Published: 2026-10-22 19:13 – Updated: 2026-10-23 15:01
VLAI
EPSS
VEX
Title
Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 Unsigned Header Bypass in Presigned S3 Upload URLs
Summary
Incus 7.0.0 before 7.0.2 and 7.1.0 before 7.5.0 contains a signature verification flaw in its built-in S3 server that allows presigned URL holders to inject unsigned x-amz-* headers. Attackers can add an unsigned X-Amz-Copy-Source header to a presigned upload URL to copy other bucket objects onto the granted key, disclosing their contents and ETags.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-23 14:48 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lxc/incus/security/advisories/… | vendor-advisory |
| https://www.vulncheck.com/advisories/incus-7.0.0-… | third-party-advisory |
Impacted products
Date Public
2026-09-25 00:00
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CVE-2026-114615 (GCVE-0-2026-114615)
Vulnerability from cvelistv5 – Published: 2026-10-22 21:10 – Updated: 2026-10-22 21:10
VLAI
EPSS
VEX
Title
Authlib incomplete algorithm-confusion fix permits HMAC forgery with prefixed public keys
Summary
Authlib is a Python library which builds OAuth and OpenID Connect servers. From 1.3.1 until 1.9.0, OctKey.import_key() checks asymmetric-key markers only at byte zero while Authlib's PEM loaders accept leading whitespace, comments, or a byte-order mark. In deployments that use the documented mixed algorithm registry and already configure verification with PEM or certificate bytes containing such a prefix, an unauthenticated attacker who knows those same public-key bytes can use them as an HMAC secret and forge HS256 tokens with arbitrary identity or authorization claims. This is a bypass of the remediation for CVE-2024-37568. The module-level jwt object reaches OctKey.import_key() in authlib/jose/rfc7518/oct_key.py, where POSSIBLE_UNSAFE_KEYS fails to identify prefixed asymmetric key material. This issue is fixed in version 1.9.0.
Severity
7.4 (High)
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/authlib/authlib/security/advis… | x_refsource_CONFIRM |
| https://github.com/authlib/authlib/pull/945 | x_refsource_MISC |
| https://github.com/authlib/authlib/commit/e3bd41c… | x_refsource_MISC |
| https://github.com/authlib/authlib/releases/tag/v1.9.0 | x_refsource_MISC |
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CVE-2026-113620 (GCVE-0-2026-113620)
Vulnerability from cvelistv5 – Published: 2026-10-20 12:34 – Updated: 2026-10-20 15:33
VLAI
EPSS
VEX
Title
Eclipse ioFog operator WebSocket accepts an unverified JWT
Summary
In Eclipse ioFog Controller versions 3.8.0 through 3.9.1, operator WebSocket upgrades on the exec and log routes do not verify the bearer JWT. The payload is decoded and its groups or roles are used as RBAC subjects. A self-minted token whose groups contain admin matches the built-in admin role, with no account and no RoleBinding. The attacker can open an exec or log session for a microservice or fog whose UUID they already know. HTTP routes are not affected: they verify the token before RBAC. Agent WebSockets verify the fog token and are not affected.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 15:33 UTC
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse ioFog |
Affected:
3.8.0 , ≤ 3.9.1
(semver)
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CVE-2026-110985 (GCVE-0-2026-110985)
Vulnerability from cvelistv5 – Published: 2026-10-28 16:37 – Updated: 2026-10-28 16:37
VLAI
EPSS
VEX
Title
Apache Kafka: Broker silently skips JWT signature verification for SASL/OAUTHBEARER when the JWKS endpoint URL is not configured
Summary
A Kafka broker using SASL/OAUTHBEARER with the default validator (sasl.oauthbearer.jwt.validator.class=DefaultJwtValidator) selects its implementation from configuration. When sasl.oauthbearer.jwks.endpoint.url is set, the validator verifies the JWT signature. When that URL is unset (the default) and no verification key resolver is supplied, DefaultJwtValidator silently falls back to ClientJwtValidator, which does not verify the JWT signature, algorithm, or issuer - and the broker starts with no warning or error. This is the residual of CVE-2026-33557, whose fix restored signature verification only on the path where the JWKS endpoint URL is set.
Impact:
A broker in this state accepts any structurally valid JWT, including "alg":"none" tokens. An unauthenticated remote attacker who can reach the listener can forge a token asserting any principal - including configured superusers - and gain full access to the cluster. Only brokers that enable SASL/OAUTHBEARER validation without a JWKS endpoint URL (and without a custom verification key resolver) are affected; brokers that set the URL verify signatures and are not affected. Unlike CVE-2026-110952 (issuer/audience not enforced by default), here no signature is verified at all.
Mitigation (all affected versions, no upgrade required):
Set sasl.oauthbearer.jwks.endpoint.url for every listener/mechanism that uses OAuthBearerValidatorCallbackHandler, or configure a signature-verifying sasl.oauthbearer.jwt.validator.class.
Resolution:
From Apache Kafka 4.2.2, 4.3.1, and 4.4.0: a broker that would fall back to the non-verifying ClientJwtValidator fails to start with a ConfigException instead of running without signature verification (secure by default).
Severity
No CVSS data available.
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://kafka.apache.org/cve-list | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Kafka |
Affected:
4.1.0 , ≤ 4.1.2
(semver)
Affected: 4.2.0 , ≤ 4.2.1 (semver) Affected: 4.3.0 (semver) |
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CVE-2026-110765 (GCVE-0-2026-110765)
Vulnerability from cvelistv5 – Published: 2026-10-14 18:47 – Updated: 2026-10-14 18:47
VLAI
EPSS
VEX
Title
FlexPrice through 2.1.38 QuickBooks Webhook Signature Verification Bypass
Summary
FlexPrice through 2.1.38 contains an authentication bypass vulnerability in HandleQuickBooksWebhook that skips signature verification when the intuit-signature header is omitted. Unauthenticated attackers knowing a tenant and environment ID can replay forged payment notifications to repeatedly add payment amounts, marking invoices paid or overpaid.
Severity
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://hackmd.io/@hieuPenguinnn/flexprice-quickb… | technical-descriptionexploit |
| https://github.com/flexprice/flexprice/blob/f27da… | technical-description |
| https://github.com/flexprice/flexprice | product |
| https://www.vulncheck.com/advisories/flexprice-th… | third-party-advisory |
Impacted products
Date Public
2026-10-14 00:00
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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.