CVE-2026-5392 | wolfSSL up to 5.9.0 PKCS7 Parser PKCS7_VerifySignedData out-of-bounds

VDB-356775 · CVE-2026-5392 · GCVE-0-2026-5392 WOLFSSL UP TO 5.9.0 PKCS7 PARSER PKCS7_VERIFYSIGNEDDATA OUT-OF-BOUNDS HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.0 $0-$5k 0.91+ Summaryinfo A vulnerability classified as problematic has been found in wolfSSL up to 5.9.0. Affected by this issue is the function PKCS7_VerifySignedData of the component PKCS7 Parser. Performing a manipulation results in out-of-bounds. This vulnerability is known as CVE-2026-5392. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component. Detailsinfo A vulnerability was found in wolfSSL up to 5.9.0. It has been classified as critical. This affects the function PKCS7_VerifySignedData of the component PKCS7 Parser. The manipulation with an unknown input leads to a out-of-bounds vulnerability. CWE is classifying the issue as CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is: Heap out-of-bounds read in PKCS7 parsing. A crafted PKCS7 message can trigger an OOB read on the heap. The missing bounds check is in the indefinite-length end-of-content verification loop in PKCS7_VerifySignedData(). The weakness was published by J Laratro. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-5392 since 04/02/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. Upgrading to version 5.9.1 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version. Productinfo Name wolfSSL Version 5.0 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9.0 License open-source Website Product: https://github.com/wolfssl/wolfssl/ 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: 7.3 VulDB Meta Temp Score: 7.0 VulDB Base Score: 7.3 VulDB Temp Score: 7.0 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Out-of-bounds CWE: CWE-125 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: wolfSSL 5.9.1 Patch: github.com Timelineinfo 04/02/2026 CVE reserved 04/10/2026 +8 days Advisory disclosed 04/10/2026 +0 days VulDB entry created 04/10/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Researcher: J Laratro Status: Confirmed CVE: CVE-2026-5392 (🔒) GCVE (CVE): GCVE-0-2026-5392 GCVE (VulDB): GCVE-100-356775 Entryinfo Created: 04/10/2026 06:54 Changes: 04/10/2026 06:54 (69) Complete: 🔍 Cache ID: 99:E57:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸