wolfSSL's wc_PKCS7_DecodeAuthEnvelopedData() does not properly sanitize the AES-GCM authentication tag length received and has no lower bounds check. A man-in-the-middle can therefore truncate the mac field from 16 bytes to 1 byte, reducing the tag check from 2⁻¹²⁸ to 2⁻⁸.
Metrics
Affected Vendors & Products
References
| Link | Providers |
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| https://github.com/wolfSSL/wolfssl/pull/10102 |
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History
Fri, 10 Apr 2026 14:15:00 +0000
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ssvc
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Fri, 10 Apr 2026 09:00:00 +0000
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Wolfssl
Wolfssl wolfssl |
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Wolfssl
Wolfssl wolfssl |
Fri, 10 Apr 2026 03:45:00 +0000
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| Description | wolfSSL's wc_PKCS7_DecodeAuthEnvelopedData() does not properly sanitize the AES-GCM authentication tag length received and has no lower bounds check. A man-in-the-middle can therefore truncate the mac field from 16 bytes to 1 byte, reducing the tag check from 2⁻¹²⁸ to 2⁻⁸. | |
| Title | Improper Validation of AES-GCM Authentication Tag Length in PKCS#7 Envelope Allows Authentication Bypass | |
| Weaknesses | CWE-20 | |
| References |
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cvssV4_0
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Status: PUBLISHED
Assigner: wolfSSL
Published: 2026-04-10T03:10:25.671Z
Updated: 2026-04-10T13:42:28.091Z
Reserved: 2026-04-03T15:33:05.734Z
Link: CVE-2026-5500
Updated: 2026-04-10T13:42:24.461Z
Status : Received
Published: 2026-04-10T04:17:17.080
Modified: 2026-04-10T04:17:17.080
Link: CVE-2026-5500
No data.