wolfSSL up to 5.9.1 signature verification

CVSS Meta Temp Score
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CTI Interest Score
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3.0$0-$5k0.00

Summaryinfo

A vulnerability was found in wolfSSL up to 5.9.1. It has been classified as problematic. Impacted is an unknown function. This manipulation causes signature verification. This vulnerability is handled as CVE-2026-7511. The attack can be initiated remotely. There is not any exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in wolfSSL up to 5.9.1 and classified as problematic. Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect integrity. The summary by CVE is:

PKCS7_verify signer confusion allows forged signatures, where the signer associated with a signature is not correctly bound, permitting a forged signature to be accepted.

The weakness was released by Nicholas Carlini. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-7511 since 04/30/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 323826 (Linux Distros Unpatched Vulnerability : CVE-2026-7511), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the databases at Tenable (323826) and EUVD (EUVD-2026-39581). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 323826
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-7511

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: github.com

Timelineinfo

04/30/2026 CVE reserved
06/25/2026 +56 days VulDB entry created
06/26/2026 +0 days Advisory disclosed
07/01/2026 +5 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Researcher: Nicholas Carlini
Status: Confirmed

CVE: CVE-2026-7511 (🔒)
GCVE (CVE): GCVE-0-2026-7511
GCVE (VulDB): GCVE-100-374071
EUVD: 🔒

Entryinfo

Created: 06/26/2026 01:24
Updated: 07/01/2026 13:15
Changes: 06/26/2026 01:24 (65), 06/26/2026 16:02 (1), 07/01/2026 13:15 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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