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293 vulnerabilities found for wolfSSL by wolfSSL
CVE-2026-5477 (GCVE-0-2026-5477)
Vulnerability from nvd – Published: 2026-04-10 05:06 – Updated: 2026-04-10 14:04
VLAI?
Title
Prefix-substitution forgery via integer overflow in wolfCrypt CMAC
Summary
An integer overflow existed in the wolfCrypt CMAC implementation, that could be exploited to forge CMAC tags. The function wc_CmacUpdate used the guard `if (cmac->totalSz != 0)` to skip XOR-chaining on the first block (where digest is all-zeros and the XOR is a no-op). However, totalSz is word32 and wraps to zero after 2^28 block flushes (4 GiB), causing the guard to erroneously discard the live CBC-MAC chain state. Any two messages sharing a common suffix beyond the 4 GiB mark then produce identical CMAC tags, enabling a zero-work prefix-substitution forgery. The fix removes the guard, making the XOR unconditional; the no-op property on the first block is preserved because digest is zero-initialized by wc_InitCmac_ex.
Severity ?
CWE
- CWE-190 - Integer overflow or wraparound
Assigner
References
Credits
Calif.io in collaboration with Claude and Anthropic Research
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CVE-2026-5500 (GCVE-0-2026-5500)
Vulnerability from nvd – Published: 2026-04-10 03:10 – Updated: 2026-04-10 13:42
VLAI?
Title
Improper Validation of AES-GCM Authentication Tag Length in PKCS#7 Envelope Allows Authentication Bypass
Summary
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.
Severity ?
CWE
- CWE-20 - Improper input validation
Assigner
References
Credits
Calif.io in collaboration with Claude and Anthropic Research
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CVE-2026-5501 (GCVE-0-2026-5501)
Vulnerability from nvd – Published: 2026-04-10 03:07 – Updated: 2026-04-10 13:43
VLAI?
Title
Improper Certificate Signature Verification in X.509 Chain Validation Allows Forged Leaf Certificates
Summary
wolfSSL_X509_verify_cert in the OpenSSL compatibility layer accepts a certificate chain in which the leaf's signature is not checked, if the attacker supplies an untrusted intermediate with Basic Constraints `CA:FALSE` that is legitimately signed by a trusted root. An attacker who obtains any leaf certificate from a trusted CA (e.g. a free DV cert from Let's Encrypt) can forge a certificate for any subject name with any public key and arbitrary signature bytes, and the function returns `WOLFSSL_SUCCESS` / `X509_V_OK`. The native wolfSSL TLS handshake path (`ProcessPeerCerts`) is not susceptible and the issue is limited to applications using the OpenSSL compatibility API directly, which would include integrations of wolfSSL into nginx and haproxy.
Severity ?
CWE
- CWE-295 - Improper certificate validation
Assigner
References
Credits
Calif.io in collaboration with Claude and Anthropic Research
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CVE-2026-5466 (GCVE-0-2026-5466)
Vulnerability from nvd – Published: 2026-04-10 03:00 – Updated: 2026-04-10 13:43
VLAI?
Title
wc_VerifyEccsiHash missing sanity check
Summary
wolfSSL's ECCSI signature verifier `wc_VerifyEccsiHash` decodes the `r` and `s` scalars from the signature blob via `mp_read_unsigned_bin` with no check that they lie in `[1, q-1]`. A crafted forged signature could verify against any message for any identity, using only publicly-known constants.
Severity ?
CWE
- CWE-347 - Improper verification of cryptographic signature
Assigner
References
Date Public ?
2026-04-10 03:00
Credits
Calif.io in collaboration with Claude and Anthropic Research
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CVE-2026-5479 (GCVE-0-2026-5479)
Vulnerability from nvd – Published: 2026-04-10 02:38 – Updated: 2026-04-10 13:44
VLAI?
Title
wolfSSL EVP ChaCha20-Poly1305 AEAD authentication tag
Summary
In wolfSSL's EVP layer, the ChaCha20-Poly1305 AEAD decryption path in wolfSSL_EVP_CipherFinal (and related EVP cipher finalization functions) fails to verify the authentication tag before returning plaintext to the caller. When an application uses the EVP API to perform ChaCha20-Poly1305 decryption, the implementation computes or accepts the tag but does not compare it against the expected value.
Severity ?
CWE
- CWE-354 - Improper Validation of Integrity Check Value
Assigner
References
Credits
Calif.io in collaboration with Claude and Anthropic Research
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CVE-2026-5188 (GCVE-0-2026-5188)
Vulnerability from nvd – Published: 2026-04-10 03:24 – Updated: 2026-04-10 13:41
VLAI?
Title
Integer underflow in X.509 SAN parsing in wolfSSL
Summary
An integer underflow issue exists in wolfSSL when parsing the Subject Alternative Name (SAN) extension of X.509 certificates. A malformed certificate can specify an entry length larger than the enclosing sequence, causing the internal length counter to wrap during parsing. This results in incorrect handling of certificate data. The issue is limited to configurations using the original ASN.1 parsing implementation which is off by default.
Severity ?
CWE
- CWE-191 - Integer underflow
Assigner
References
Date Public ?
2026-03-31 00:02
Credits
Discovered by Muhammad Arya Arjuna Habibullah
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CVE-2026-5460 (GCVE-0-2026-5460)
Vulnerability from nvd – Published: 2026-04-09 23:29 – Updated: 2026-04-10 13:51
VLAI?
Title
Heap Use-After-Free in PQC Hybrid KeyShare Error Cleanup in wolfSSL TLS 1.3
Summary
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Severity ?
CWE
- CWE-416 - Use After Free
Assigner
References
Credits
Calvin Young (eWalker Consulting Inc.)
Enoch Chow (Isomorph Cyber)
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CVE-2026-5393 (GCVE-0-2026-5393)
Vulnerability from nvd – Published: 2026-04-09 23:02 – Updated: 2026-04-10 15:02
VLAI?
Title
OOB Read in DoTls13CertificateVerify with WOLFSSL_DUAL_ALG_CERTS
Summary
Dual-Algorithm CertificateVerify out-of-bounds read. When processing a dual-algorithm CertificateVerify message, an out-of-bounds read can occur on crafted input. This can only occur when --enable-experimental and --enable-dual-alg-certs is used when building wolfSSL.
Severity ?
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Credits
Sunwoo Lee, (Korea Institute of Energy Technology, KENTECH) for testing
Woohyun Choi, (Korea Institute of Energy Technology, KENTECH) for testing
Seunghyun Yoon, (Korea Institute of Energy Technology, KENTECH) for testing
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CVE-2026-5448 (GCVE-0-2026-5448)
Vulnerability from nvd – Published: 2026-04-09 23:18 – Updated: 2026-04-10 13:51
VLAI?
Title
1-2 Byte Buffer Overflow in wolfSSL_X509_notAfter/notBefore
Summary
X.509 date buffer overflow in wolfSSL_X509_notAfter / wolfSSL_X509_notBefore. A buffer overflow may occur when parsing date fields from a crafted X.509 certificate via the compatibility layer API. This is only triggered when calling these two APIs directly from an application, and does not affect TLS or certificate verify operations in wolfSSL.
Severity ?
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
Credits
Sunwoo Lee, Korea Institute of Energy Technology (KENTECH)
Seunghyun Yoon, Korea Institute of Energy Technology (KENTECH)
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CVE-2026-5392 (GCVE-0-2026-5392)
Vulnerability from nvd – Published: 2026-04-09 23:10 – Updated: 2026-04-10 14:08
VLAI?
Title
wolfSSL heap OOB read in PKCS7 SignedData streaming
Summary
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().
Severity ?
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Credits
J Laratro (d0sf3t)
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CVE-2026-5507 (GCVE-0-2026-5507)
Vulnerability from nvd – Published: 2026-04-09 22:18 – Updated: 2026-04-09 22:18
VLAI?
Title
Session Cache Restore — Arbitrary Free via Deserialized Pointer
Summary
When restoring a session from cache, a pointer from the serialized session data is used in a free operation without validation. An attacker who can poison the session cache could trigger an arbitrary free. Exploitation requires the ability to inject a crafted session into the cache and for the application to call specific session restore APIs.
Severity ?
CWE
- CWE-502 - Deserialization of untrusted data
Assigner
References
Credits
Sunwoo Lee (Korea Institute of Energy Technology, KENTECH)
Woohyun Choi (Korea Institute of Energy Technology, KENTECH)
Seunghyun Yoon (Korea Institute of Energy Technology, KENTECH)
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CVE-2026-5295 (GCVE-0-2026-5295)
Vulnerability from nvd – Published: 2026-04-09 22:53 – Updated: 2026-04-09 22:53
VLAI?
Title
Stack Buffer Overflow in wolfSSL PKCS7 wc_PKCS7_DecryptOri() via Oversized OID
Summary
A stack buffer overflow exists in wolfSSL's PKCS7 implementation in the wc_PKCS7_DecryptOri() function in wolfcrypt/src/pkcs7.c. When processing a CMS EnvelopedData message containing an OtherRecipientInfo (ORI) recipient, the function copies an ASN.1-parsed OID into a fixed 32-byte stack buffer (oriOID[MAX_OID_SZ]) via XMEMCPY without first validating that the parsed OID length does not exceed MAX_OID_SZ. A crafted CMS EnvelopedData message with an ORI recipient containing an OID longer than 32 bytes triggers a stack buffer overflow. Exploitation requires the library to be built with --enable-pkcs7 (disabled by default) and the application to have registered an ORI decrypt callback via wc_PKCS7_SetOriDecryptCb().
Severity ?
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
Credits
Sunwoo Lee, (Korea Institute of Energy Technology, KENTECH)
Woohyun Choi, (Korea Institute of Energy Technology, KENTECH)
Seunghyun Yoon, (Korea Institute of Energy Technology, KENTECH)
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CVE-2026-5504 (GCVE-0-2026-5504)
Vulnerability from nvd – Published: 2026-04-09 22:33 – Updated: 2026-04-09 22:33
VLAI?
Title
PKCS7 CBC Padding Oracle — Plaintext Recovery
Summary
A padding oracle exists in wolfSSL's PKCS7 CBC decryption that could allow an attacker to recover plaintext through repeated decryption queries with modified ciphertext. In previous versions of wolfSSL the interior padding bytes are not validated.
Severity ?
CWE
- CWE-354 - Improper validation of integrity check value
Assigner
References
Credits
Sunwoo Lee of Korea Institute of Energy Technology (KENTECH) for the report.
Woohyun Choi of Korea Institute of Energy Technology (KENTECH) for the report.
Seunghyun Yoon of Korea Institute of Energy Technology (KENTECH) for the report.
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CVE-2026-5503 (GCVE-0-2026-5503)
Vulnerability from nvd – Published: 2026-04-09 22:35 – Updated: 2026-04-10 17:58
VLAI?
Title
out-of-bounds write in TLSX_EchChangeSNI via attacker-controlled publicName
Summary
In TLSX_EchChangeSNI, the ctx->extensions branch set extensions unconditionally even when TLSX_Find returned NULL. This caused TLSX_UseSNI to attach the attacker-controlled publicName to the shared WOLFSSL_CTX when no inner SNI was configured. TLSX_EchRestoreSNI then failed to clean it up because its removal was gated on serverNameX != NULL. The inner ClientHello was sized before the pollution but written after it, causing TLSX_SNI_Write to memcpy 255 bytes past the allocation boundary.
Severity ?
CWE
- CWE-787 - Out-of-bounds write
Assigner
References
Credits
Calif.io in collaboration with Claude and Anthropic Research
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CVE-2026-5778 (GCVE-0-2026-5778)
Vulnerability from nvd – Published: 2026-04-09 21:45 – Updated: 2026-04-10 13:53
VLAI?
Title
Integer underflow leads to out-of-bounds access in sniffer ChaCha decrypt path.
Summary
Integer underflow in wolfSSL packet sniffer <= 5.9.0 allows an attacker to cause a program crash in the AEAD decryption path by injecting a TLS record shorter than the explicit IV plus authentication tag into traffic inspected by ssl_DecodePacket. The underflow wraps a 16-bit length to a large value that is passed to AEAD decryption routines, causing a large out-of-bounds read and crash. An unauthenticated attacker can trigger this remotely via malformed TLS Application Data records.
Severity ?
CWE
- CWE-191 - Integer underflow (wrap or wraparound)
Assigner
References
Credits
Zou Dikai
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CVE-2026-5263 (GCVE-0-2026-5263)
Vulnerability from nvd – Published: 2026-04-09 21:15 – Updated: 2026-04-10 18:09
VLAI?
Title
URI nameConstraints not enforced in ConfirmNameConstraints()
Summary
URI nameConstraints from constrained intermediate CAs are parsed but not enforced during certificate chain verification in wolfcrypt/src/asn.c. A compromised or malicious sub-CA could issue leaf certificates with URI SAN entries that violate the nameConstraints of the issuing CA, and wolfSSL would accept them as valid.
Severity ?
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
Credits
Oleh Konko @1seal
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CVE-2026-5477 (GCVE-0-2026-5477)
Vulnerability from cvelistv5 – Published: 2026-04-10 05:06 – Updated: 2026-04-10 14:04
VLAI?
Title
Prefix-substitution forgery via integer overflow in wolfCrypt CMAC
Summary
An integer overflow existed in the wolfCrypt CMAC implementation, that could be exploited to forge CMAC tags. The function wc_CmacUpdate used the guard `if (cmac->totalSz != 0)` to skip XOR-chaining on the first block (where digest is all-zeros and the XOR is a no-op). However, totalSz is word32 and wraps to zero after 2^28 block flushes (4 GiB), causing the guard to erroneously discard the live CBC-MAC chain state. Any two messages sharing a common suffix beyond the 4 GiB mark then produce identical CMAC tags, enabling a zero-work prefix-substitution forgery. The fix removes the guard, making the XOR unconditional; the no-op property on the first block is preserved because digest is zero-initialized by wc_InitCmac_ex.
Severity ?
CWE
- CWE-190 - Integer overflow or wraparound
Assigner
References
Credits
Calif.io in collaboration with Claude and Anthropic Research
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CVE-2026-5188 (GCVE-0-2026-5188)
Vulnerability from cvelistv5 – Published: 2026-04-10 03:24 – Updated: 2026-04-10 13:41
VLAI?
Title
Integer underflow in X.509 SAN parsing in wolfSSL
Summary
An integer underflow issue exists in wolfSSL when parsing the Subject Alternative Name (SAN) extension of X.509 certificates. A malformed certificate can specify an entry length larger than the enclosing sequence, causing the internal length counter to wrap during parsing. This results in incorrect handling of certificate data. The issue is limited to configurations using the original ASN.1 parsing implementation which is off by default.
Severity ?
CWE
- CWE-191 - Integer underflow
Assigner
References
Date Public ?
2026-03-31 00:02
Credits
Discovered by Muhammad Arya Arjuna Habibullah
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CVE-2026-5500 (GCVE-0-2026-5500)
Vulnerability from cvelistv5 – Published: 2026-04-10 03:10 – Updated: 2026-04-10 13:42
VLAI?
Title
Improper Validation of AES-GCM Authentication Tag Length in PKCS#7 Envelope Allows Authentication Bypass
Summary
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.
Severity ?
CWE
- CWE-20 - Improper input validation
Assigner
References
Credits
Calif.io in collaboration with Claude and Anthropic Research
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CVE-2026-5501 (GCVE-0-2026-5501)
Vulnerability from cvelistv5 – Published: 2026-04-10 03:07 – Updated: 2026-04-10 13:43
VLAI?
Title
Improper Certificate Signature Verification in X.509 Chain Validation Allows Forged Leaf Certificates
Summary
wolfSSL_X509_verify_cert in the OpenSSL compatibility layer accepts a certificate chain in which the leaf's signature is not checked, if the attacker supplies an untrusted intermediate with Basic Constraints `CA:FALSE` that is legitimately signed by a trusted root. An attacker who obtains any leaf certificate from a trusted CA (e.g. a free DV cert from Let's Encrypt) can forge a certificate for any subject name with any public key and arbitrary signature bytes, and the function returns `WOLFSSL_SUCCESS` / `X509_V_OK`. The native wolfSSL TLS handshake path (`ProcessPeerCerts`) is not susceptible and the issue is limited to applications using the OpenSSL compatibility API directly, which would include integrations of wolfSSL into nginx and haproxy.
Severity ?
CWE
- CWE-295 - Improper certificate validation
Assigner
References
Credits
Calif.io in collaboration with Claude and Anthropic Research
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CVE-2026-5466 (GCVE-0-2026-5466)
Vulnerability from cvelistv5 – Published: 2026-04-10 03:00 – Updated: 2026-04-10 13:43
VLAI?
Title
wc_VerifyEccsiHash missing sanity check
Summary
wolfSSL's ECCSI signature verifier `wc_VerifyEccsiHash` decodes the `r` and `s` scalars from the signature blob via `mp_read_unsigned_bin` with no check that they lie in `[1, q-1]`. A crafted forged signature could verify against any message for any identity, using only publicly-known constants.
Severity ?
CWE
- CWE-347 - Improper verification of cryptographic signature
Assigner
References
Date Public ?
2026-04-10 03:00
Credits
Calif.io in collaboration with Claude and Anthropic Research
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CVE-2026-5479 (GCVE-0-2026-5479)
Vulnerability from cvelistv5 – Published: 2026-04-10 02:38 – Updated: 2026-04-10 13:44
VLAI?
Title
wolfSSL EVP ChaCha20-Poly1305 AEAD authentication tag
Summary
In wolfSSL's EVP layer, the ChaCha20-Poly1305 AEAD decryption path in wolfSSL_EVP_CipherFinal (and related EVP cipher finalization functions) fails to verify the authentication tag before returning plaintext to the caller. When an application uses the EVP API to perform ChaCha20-Poly1305 decryption, the implementation computes or accepts the tag but does not compare it against the expected value.
Severity ?
CWE
- CWE-354 - Improper Validation of Integrity Check Value
Assigner
References
Credits
Calif.io in collaboration with Claude and Anthropic Research
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CVE-2026-5460 (GCVE-0-2026-5460)
Vulnerability from cvelistv5 – Published: 2026-04-09 23:29 – Updated: 2026-04-10 13:51
VLAI?
Title
Heap Use-After-Free in PQC Hybrid KeyShare Error Cleanup in wolfSSL TLS 1.3
Summary
A heap use-after-free exists in wolfSSL's TLS 1.3 post-quantum cryptography (PQC) hybrid KeyShare processing. In the error handling path of TLSX_KeyShare_ProcessPqcHybridClient() in src/tls.c, the inner function TLSX_KeyShare_ProcessPqcClient_ex() frees a KyberKey object upon encountering an error. The caller then invokes TLSX_KeyShare_FreeAll(), which attempts to call ForceZero() on the already-freed KyberKey, resulting in writes of zero bytes over freed heap memory.
Severity ?
CWE
- CWE-416 - Use After Free
Assigner
References
Credits
Calvin Young (eWalker Consulting Inc.)
Enoch Chow (Isomorph Cyber)
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CVE-2026-5448 (GCVE-0-2026-5448)
Vulnerability from cvelistv5 – Published: 2026-04-09 23:18 – Updated: 2026-04-10 13:51
VLAI?
Title
1-2 Byte Buffer Overflow in wolfSSL_X509_notAfter/notBefore
Summary
X.509 date buffer overflow in wolfSSL_X509_notAfter / wolfSSL_X509_notBefore. A buffer overflow may occur when parsing date fields from a crafted X.509 certificate via the compatibility layer API. This is only triggered when calling these two APIs directly from an application, and does not affect TLS or certificate verify operations in wolfSSL.
Severity ?
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
Credits
Sunwoo Lee, Korea Institute of Energy Technology (KENTECH)
Seunghyun Yoon, Korea Institute of Energy Technology (KENTECH)
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CVE-2026-5392 (GCVE-0-2026-5392)
Vulnerability from cvelistv5 – Published: 2026-04-09 23:10 – Updated: 2026-04-10 14:08
VLAI?
Title
wolfSSL heap OOB read in PKCS7 SignedData streaming
Summary
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().
Severity ?
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Credits
J Laratro (d0sf3t)
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CVE-2026-5393 (GCVE-0-2026-5393)
Vulnerability from cvelistv5 – Published: 2026-04-09 23:02 – Updated: 2026-04-10 15:02
VLAI?
Title
OOB Read in DoTls13CertificateVerify with WOLFSSL_DUAL_ALG_CERTS
Summary
Dual-Algorithm CertificateVerify out-of-bounds read. When processing a dual-algorithm CertificateVerify message, an out-of-bounds read can occur on crafted input. This can only occur when --enable-experimental and --enable-dual-alg-certs is used when building wolfSSL.
Severity ?
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Credits
Sunwoo Lee, (Korea Institute of Energy Technology, KENTECH) for testing
Woohyun Choi, (Korea Institute of Energy Technology, KENTECH) for testing
Seunghyun Yoon, (Korea Institute of Energy Technology, KENTECH) for testing
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CVE-2026-5295 (GCVE-0-2026-5295)
Vulnerability from cvelistv5 – Published: 2026-04-09 22:53 – Updated: 2026-04-09 22:53
VLAI?
Title
Stack Buffer Overflow in wolfSSL PKCS7 wc_PKCS7_DecryptOri() via Oversized OID
Summary
A stack buffer overflow exists in wolfSSL's PKCS7 implementation in the wc_PKCS7_DecryptOri() function in wolfcrypt/src/pkcs7.c. When processing a CMS EnvelopedData message containing an OtherRecipientInfo (ORI) recipient, the function copies an ASN.1-parsed OID into a fixed 32-byte stack buffer (oriOID[MAX_OID_SZ]) via XMEMCPY without first validating that the parsed OID length does not exceed MAX_OID_SZ. A crafted CMS EnvelopedData message with an ORI recipient containing an OID longer than 32 bytes triggers a stack buffer overflow. Exploitation requires the library to be built with --enable-pkcs7 (disabled by default) and the application to have registered an ORI decrypt callback via wc_PKCS7_SetOriDecryptCb().
Severity ?
CWE
- CWE-121 - Stack-based Buffer Overflow
Assigner
References
Credits
Sunwoo Lee, (Korea Institute of Energy Technology, KENTECH)
Woohyun Choi, (Korea Institute of Energy Technology, KENTECH)
Seunghyun Yoon, (Korea Institute of Energy Technology, KENTECH)
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CVE-2026-5503 (GCVE-0-2026-5503)
Vulnerability from cvelistv5 – Published: 2026-04-09 22:35 – Updated: 2026-04-10 17:58
VLAI?
Title
out-of-bounds write in TLSX_EchChangeSNI via attacker-controlled publicName
Summary
In TLSX_EchChangeSNI, the ctx->extensions branch set extensions unconditionally even when TLSX_Find returned NULL. This caused TLSX_UseSNI to attach the attacker-controlled publicName to the shared WOLFSSL_CTX when no inner SNI was configured. TLSX_EchRestoreSNI then failed to clean it up because its removal was gated on serverNameX != NULL. The inner ClientHello was sized before the pollution but written after it, causing TLSX_SNI_Write to memcpy 255 bytes past the allocation boundary.
Severity ?
CWE
- CWE-787 - Out-of-bounds write
Assigner
References
Credits
Calif.io in collaboration with Claude and Anthropic Research
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CVE-2026-5504 (GCVE-0-2026-5504)
Vulnerability from cvelistv5 – Published: 2026-04-09 22:33 – Updated: 2026-04-09 22:33
VLAI?
Title
PKCS7 CBC Padding Oracle — Plaintext Recovery
Summary
A padding oracle exists in wolfSSL's PKCS7 CBC decryption that could allow an attacker to recover plaintext through repeated decryption queries with modified ciphertext. In previous versions of wolfSSL the interior padding bytes are not validated.
Severity ?
CWE
- CWE-354 - Improper validation of integrity check value
Assigner
References
Credits
Sunwoo Lee of Korea Institute of Energy Technology (KENTECH) for the report.
Woohyun Choi of Korea Institute of Energy Technology (KENTECH) for the report.
Seunghyun Yoon of Korea Institute of Energy Technology (KENTECH) for the report.
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CVE-2026-5507 (GCVE-0-2026-5507)
Vulnerability from cvelistv5 – Published: 2026-04-09 22:18 – Updated: 2026-04-09 22:18
VLAI?
Title
Session Cache Restore — Arbitrary Free via Deserialized Pointer
Summary
When restoring a session from cache, a pointer from the serialized session data is used in a free operation without validation. An attacker who can poison the session cache could trigger an arbitrary free. Exploitation requires the ability to inject a crafted session into the cache and for the application to call specific session restore APIs.
Severity ?
CWE
- CWE-502 - Deserialization of untrusted data
Assigner
References
Credits
Sunwoo Lee (Korea Institute of Energy Technology, KENTECH)
Woohyun Choi (Korea Institute of Energy Technology, KENTECH)
Seunghyun Yoon (Korea Institute of Energy Technology, KENTECH)
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