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171 vulnerabilities found for wolfssl by wolfSSL
CVE-2026-4159 (GCVE-0-2026-4159)
Vulnerability from nvd – Published: 2026-03-19 21:17 – Updated: 2026-03-19 21:17
VLAI?
Title
wc_PKCS7_DecodeEnvelopedData 1 byte out-of-bounds read
Summary
1-byte OOB heap read in wc_PKCS7_DecodeEnvelopedData via zero-length encrypted content. A vulnerability existed in wolfSSL 5.8.4 and earlier, where a 1-byte out-of-bounds heap read in wc_PKCS7_DecodeEnvelopedData could be triggered by a crafted CMS EnvelopedData message with zero-length encrypted content. Note that PKCS7 support is disabled by default.
Severity ?
CWE
- CWE-125 - Out-of-bounds read
Assigner
References
Credits
Haruto Kimura (Stella)
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CVE-2026-4395 (GCVE-0-2026-4395)
Vulnerability from nvd – Published: 2026-03-19 20:41 – Updated: 2026-03-19 20:41
VLAI?
Title
Heap-based buffer overflow in wc_ecc_import_x963_ex KCAPI path
Summary
Heap-based buffer overflow in the KCAPI ECC code path of wc_ecc_import_x963_ex() in wolfSSL wolfcrypt allows a remote attacker to write attacker-controlled data past the bounds of the pubkey_raw buffer via a crafted oversized EC public key point. The WOLFSSL_KCAPI_ECC code path copies the input to key->pubkey_raw (132 bytes) using XMEMCPY without a bounds check, unlike the ATECC code path which includes a length validation. This can be triggered during TLS key exchange when a malicious peer sends a crafted ECPoint in ServerKeyExchange.
Severity ?
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
| URL | Tags | |
|---|---|---|
Credits
Haruto Kimura (Stella)
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CVE-2026-3547 (GCVE-0-2026-3547)
Vulnerability from nvd – Published: 2026-03-19 20:20 – Updated: 2026-03-19 20:20
VLAI?
Title
wolfSSL: out-of-bounds read (DoS) in ALPN parsing due to incomplete validation
Summary
Out-of-bounds read in ALPN parsing due to incomplete validation. wolfSSL 5.8.4 and earlier contained an out-of-bounds read in ALPN handling when built with ALPN enabled (HAVE_ALPN / --enable-alpn). A crafted ALPN protocol list could trigger an out-of-bounds read, leading to a potential process crash (denial of service). Note that ALPN is disabled by default, but is enabled for these 3rd party compatibility features: enable-apachehttpd, enable-bind, enable-curl, enable-haproxy, enable-hitch, enable-lighty, enable-jni, enable-nginx, enable-quic.
Severity ?
7.5 (High)
CWE
- CWE-125 - out-of-bounds read
Assigner
References
| URL | Tags | |
|---|---|---|
Credits
Oleh Konko
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CVE-2026-3230 (GCVE-0-2026-3230)
Vulnerability from nvd – Published: 2026-03-19 20:59 – Updated: 2026-03-19 20:59
VLAI?
Title
Improper key_share validation in TLS 1.3 HelloRetryRequest
Summary
Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in wolfSSL could lead to a compromise in the confidentiality of TLS-protected communications via a crafted HelloRetryRequest followed by a ServerHello message that omits the required key_share extension, resulting in derivation of predictable traffic secrets from (EC)DHE shared secret. This issue does not affect the client's authentication of the server during TLS handshakes.
Severity ?
CWE
- CWE-20 - Improper Input Validation Improper Input Validation
Assigner
References
Credits
Jaehun Lee, Pohang University of Science and Technology (POSTECH)
Kyungmin Bae, Pohang University of Science and Technology (POSTECH)
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CVE-2026-3580 (GCVE-0-2026-3580)
Vulnerability from nvd – Published: 2026-03-19 19:46 – Updated: 2026-03-19 20:25
VLAI?
Title
Compiler-induced timing leak in sp_256_get_entry_256_9 on RISC-V
Summary
In wolfSSL 5.8.4, constant-time masking logic in sp_256_get_entry_256_9 is optimized into conditional branches (bnez) by GCC when targeting RISC-V RV32I with -O3. This transformation breaks the side-channel resistance of ECC scalar multiplication, potentially allowing a local attacker to recover secret keys via timing analysis.
Severity ?
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
Credits
Wind Wong
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CVE-2026-3579 (GCVE-0-2026-3579)
Vulnerability from nvd – Published: 2026-03-19 19:37 – Updated: 2026-03-19 19:37
VLAI?
Title
Non-constant time multiplication subroutine __muldi3 on RISC-V RV32I
Summary
wolfSSL 5.8.4 on RISC-V RV32I architectures lacks a constant-time software implementation for 64-bit multiplication. The compiler-inserted __muldi3 subroutine executes in variable time based on operand values. This affects multiple SP math functions (sp_256_mul_9, sp_256_sqr_9, etc.), leading to a timing side-channel that may expose sensitive cryptographic data.
Severity ?
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
Credits
Wind Wong
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CVE-2026-3548 (GCVE-0-2026-3548)
Vulnerability from nvd – Published: 2026-03-19 17:45 – Updated: 2026-03-19 18:00
VLAI?
Title
Buffer overflow in CRL number parsing in wolfSSL
Summary
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Severity ?
Assigner
References
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CVE-2026-2646 (GCVE-0-2026-2646)
Vulnerability from nvd – Published: 2026-03-19 17:25 – Updated: 2026-03-19 17:44
VLAI?
Title
Heap buffer overflow in session parsing with wolfSSL_d2i_SSL_SESSION() function
Summary
A heap-buffer-overflow vulnerability exists in wolfSSL's wolfSSL_d2i_SSL_SESSION() function. When deserializing session data with SESSION_CERTS enabled, certificate and session id lengths are read from an untrusted input without bounds validation, allowing an attacker to overflow fixed-size buffers and corrupt heap memory. A maliciously crafted session would need to be loaded from an external source to trigger this vulnerability. Internal sessions were not vulnerable.
Severity ?
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
Credits
Jonathan Bar Or (@yo_yo_yo_jbo)
Haruto Kimura (Stella)
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CVE-2026-2645 (GCVE-0-2026-2645)
Vulnerability from nvd – Published: 2026-03-19 17:10 – Updated: 2026-03-19 17:45
VLAI?
Title
Acceptance of CertificateVerify Message before ClientKeyExchange in TLS 1.2
Summary
In wolfSSL 5.8.2 and earlier, a logic flaw existed in the TLS 1.2 server state machine implementation. The server could incorrectly accept the CertificateVerify message before the ClientKeyExchange message had been received. This issue affects wolfSSL before 5.8.4 (wolfSSL 5.8.2 and earlier is vulnerable, 5.8.4 is not vulnerable). In 5.8.4 wolfSSL would detect the issue later in the handshake. 5.9.0 was further hardened to catch the issue earlier in the handshake.
Severity ?
CWE
- CWE-358 - Improperly Implemented Security Check for Standard
Assigner
References
Date Public ?
2026-03-20 00:24
Credits
Kai Tian
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CVE-2026-1005 (GCVE-0-2026-1005)
Vulnerability from nvd – Published: 2026-03-19 17:00 – Updated: 2026-03-19 17:20
VLAI?
Title
Integer underflow leads to out-of-bounds access in sniffer AES-GCM/CCM/ARIA-GCM decrypt path
Summary
Integer underflow in wolfSSL packet sniffer <= 5.8.4 allows an attacker to cause a buffer overflow 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 heap buffer overflow and a 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
Prasanth Sundararajan
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CVE-2026-0819 (GCVE-0-2026-0819)
Vulnerability from nvd – Published: 2026-03-19 16:54 – Updated: 2026-03-19 17:19
VLAI?
Title
Stack buffer overflow in PKCS7 SignedData encoding with custom signed attributes
Summary
A stack buffer overflow vulnerability exists in wolfSSL's PKCS7 SignedData encoding functionality. In wc_PKCS7_BuildSignedAttributes(), when adding custom signed attributes, the code passes an incorrect capacity value (esd->signedAttribsCount) to EncodeAttributes() instead of the remaining available space in the fixed-size signedAttribs[7] array. When an application sets pkcs7->signedAttribsSz to a value greater than MAX_SIGNED_ATTRIBS_SZ (default 7) minus the number of default attributes already added, EncodeAttributes() writes beyond the array bounds, causing stack memory corruption. In WOLFSSL_SMALL_STACK builds, this becomes heap corruption. Exploitation requires an application that allows untrusted input to control the signedAttribs array size when calling wc_PKCS7_EncodeSignedData() or related signing functions.
Severity ?
Assigner
References
Credits
Maor Caplan
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CVE-2025-13912 (GCVE-0-2025-13912)
Vulnerability from nvd – Published: 2025-12-11 17:09 – Updated: 2025-12-11 19:35
VLAI?
Title
Potential non-constant time compiled code with Clang LLVM
Summary
Multiple constant-time implementations in wolfSSL before version 5.8.4 may be transformed into non-constant-time binary by LLVM optimizations, which can potentially result in observable timing discrepancies and lead to information disclosure through timing side-channel attacks.
Severity ?
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
Credits
Jing Liu
Zhiyuan Zhang
LUCÍA MARTÍNEZ GAVIER
Gilles Barthe
Marcel Böhme
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CVE-2025-12889 (GCVE-0-2025-12889)
Vulnerability from nvd – Published: 2025-11-21 23:06 – Updated: 2025-12-08 15:39
VLAI?
Title
TLS 1.2 Client Can Downgrade Digest Used
Summary
With TLS 1.2 connections a client can use any digest, specifically a weaker digest that is supported, rather than those in the CertificateRequest.
Severity ?
CWE
- CWE-20 - Improper Input Validation
Assigner
References
Credits
Jaehun Lee from Pohang University of Science and Technology (POSTECH)
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CVE-2025-12888 (GCVE-0-2025-12888)
Vulnerability from nvd – Published: 2025-11-21 22:50 – Updated: 2025-12-08 15:51
VLAI?
Title
Constant Time Issue with Xtensa-based ESP32 and X22519
Summary
Vulnerability in X25519 constant-time cryptographic implementations due to timing side channels introduced by compiler optimizations and CPU architecture limitations, specifically with the Xtensa-based ESP32 chips. If targeting Xtensa it is recommended to use the low memory implementations of X25519, which is now turned on as the default for Xtensa.
Severity ?
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
Credits
Adrian Cinal
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CVE-2025-11936 (GCVE-0-2025-11936)
Vulnerability from nvd – Published: 2025-11-21 22:24 – Updated: 2025-12-08 15:50
VLAI?
Title
Potential DoS Vulnerability through Multiple KeyShareEntry with Same Group in TLS 1.3 ClientHello
Summary
Improper input validation in the TLS 1.3 KeyShareEntry parsing in wolfSSL v5.8.2 on multiple platforms allows a remote unauthenticated attacker to cause a denial-of-service by sending a crafted ClientHello message containing duplicate KeyShareEntry values for the same supported group, leading to excessive CPU and memory consumption during ClientHello processing.
Severity ?
CWE
- CWE-20 - Improper Input Validation
Assigner
References
Credits
Jaehun Lee, Pohang University of Science and Technology (POSTECH)
Kyungmin Bae, Pohang University of Science and Technology (POSTECH)
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CVE-2025-11934 (GCVE-0-2025-11934)
Vulnerability from nvd – Published: 2025-11-21 22:12 – Updated: 2025-12-08 15:48
VLAI?
Title
Improper Validation of Signature Algorithm Used in TLS 1.3 CertificateVerify
Summary
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Severity ?
CWE
- CWE-20 - Improper Input Validation
Assigner
References
Credits
Jaehun Lee, Pohang University of Science and Technology (POSTECH)
Kyungmin Bae, Pohang University of Science and Technology (POSTECH)
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CVE-2025-11933 (GCVE-0-2025-11933)
Vulnerability from nvd – Published: 2025-11-21 22:19 – Updated: 2025-12-08 15:47
VLAI?
Title
DoS Vulnerability in wolfSSL TLS 1.3 CKS Extension
Summary
Improper Input Validation in the TLS 1.3 CKS extension parsing in wolfSSL 5.8.2 and earlier on multiple platforms allows a remote unauthenticated attacker to potentially cause a denial-of-service via a crafted ClientHello message with duplicate CKS extensions.
Severity ?
CWE
- CWE-20 - Improper Input Validation
Assigner
References
Credits
Jaehun Lee, Pohang University of Science and Technology (POSTECH)
Kyungmin Bae, Pohang University of Science and Technology (POSTECH)
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CVE-2025-11932 (GCVE-0-2025-11932)
Vulnerability from nvd – Published: 2025-11-21 23:01 – Updated: 2025-12-08 15:39
VLAI?
Title
Timing Side-Channel in PSK Binder Verification
Summary
The server previously verified the TLS 1.3 PSK binder using a non-constant time method which could potentially leak information about the PSK binder
Severity ?
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
Credits
Luigino Camastra from Aisle Research
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CVE-2026-4159 (GCVE-0-2026-4159)
Vulnerability from cvelistv5 – Published: 2026-03-19 21:17 – Updated: 2026-03-19 21:17
VLAI?
Title
wc_PKCS7_DecodeEnvelopedData 1 byte out-of-bounds read
Summary
1-byte OOB heap read in wc_PKCS7_DecodeEnvelopedData via zero-length encrypted content. A vulnerability existed in wolfSSL 5.8.4 and earlier, where a 1-byte out-of-bounds heap read in wc_PKCS7_DecodeEnvelopedData could be triggered by a crafted CMS EnvelopedData message with zero-length encrypted content. Note that PKCS7 support is disabled by default.
Severity ?
CWE
- CWE-125 - Out-of-bounds read
Assigner
References
Credits
Haruto Kimura (Stella)
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CVE-2026-3230 (GCVE-0-2026-3230)
Vulnerability from cvelistv5 – Published: 2026-03-19 20:59 – Updated: 2026-03-19 20:59
VLAI?
Title
Improper key_share validation in TLS 1.3 HelloRetryRequest
Summary
Missing required cryptographic step in the TLS 1.3 client HelloRetryRequest handshake logic in wolfSSL could lead to a compromise in the confidentiality of TLS-protected communications via a crafted HelloRetryRequest followed by a ServerHello message that omits the required key_share extension, resulting in derivation of predictable traffic secrets from (EC)DHE shared secret. This issue does not affect the client's authentication of the server during TLS handshakes.
Severity ?
CWE
- CWE-20 - Improper Input Validation Improper Input Validation
Assigner
References
Credits
Jaehun Lee, Pohang University of Science and Technology (POSTECH)
Kyungmin Bae, Pohang University of Science and Technology (POSTECH)
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CVE-2026-4395 (GCVE-0-2026-4395)
Vulnerability from cvelistv5 – Published: 2026-03-19 20:41 – Updated: 2026-03-19 20:41
VLAI?
Title
Heap-based buffer overflow in wc_ecc_import_x963_ex KCAPI path
Summary
Heap-based buffer overflow in the KCAPI ECC code path of wc_ecc_import_x963_ex() in wolfSSL wolfcrypt allows a remote attacker to write attacker-controlled data past the bounds of the pubkey_raw buffer via a crafted oversized EC public key point. The WOLFSSL_KCAPI_ECC code path copies the input to key->pubkey_raw (132 bytes) using XMEMCPY without a bounds check, unlike the ATECC code path which includes a length validation. This can be triggered during TLS key exchange when a malicious peer sends a crafted ECPoint in ServerKeyExchange.
Severity ?
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
| URL | Tags | |
|---|---|---|
Credits
Haruto Kimura (Stella)
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CVE-2026-3547 (GCVE-0-2026-3547)
Vulnerability from cvelistv5 – Published: 2026-03-19 20:20 – Updated: 2026-03-19 20:20
VLAI?
Title
wolfSSL: out-of-bounds read (DoS) in ALPN parsing due to incomplete validation
Summary
Out-of-bounds read in ALPN parsing due to incomplete validation. wolfSSL 5.8.4 and earlier contained an out-of-bounds read in ALPN handling when built with ALPN enabled (HAVE_ALPN / --enable-alpn). A crafted ALPN protocol list could trigger an out-of-bounds read, leading to a potential process crash (denial of service). Note that ALPN is disabled by default, but is enabled for these 3rd party compatibility features: enable-apachehttpd, enable-bind, enable-curl, enable-haproxy, enable-hitch, enable-lighty, enable-jni, enable-nginx, enable-quic.
Severity ?
7.5 (High)
CWE
- CWE-125 - out-of-bounds read
Assigner
References
| URL | Tags | |
|---|---|---|
Credits
Oleh Konko
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CVE-2026-3580 (GCVE-0-2026-3580)
Vulnerability from cvelistv5 – Published: 2026-03-19 19:46 – Updated: 2026-03-19 20:25
VLAI?
Title
Compiler-induced timing leak in sp_256_get_entry_256_9 on RISC-V
Summary
In wolfSSL 5.8.4, constant-time masking logic in sp_256_get_entry_256_9 is optimized into conditional branches (bnez) by GCC when targeting RISC-V RV32I with -O3. This transformation breaks the side-channel resistance of ECC scalar multiplication, potentially allowing a local attacker to recover secret keys via timing analysis.
Severity ?
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
Credits
Wind Wong
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CVE-2026-3579 (GCVE-0-2026-3579)
Vulnerability from cvelistv5 – Published: 2026-03-19 19:37 – Updated: 2026-03-19 19:37
VLAI?
Title
Non-constant time multiplication subroutine __muldi3 on RISC-V RV32I
Summary
wolfSSL 5.8.4 on RISC-V RV32I architectures lacks a constant-time software implementation for 64-bit multiplication. The compiler-inserted __muldi3 subroutine executes in variable time based on operand values. This affects multiple SP math functions (sp_256_mul_9, sp_256_sqr_9, etc.), leading to a timing side-channel that may expose sensitive cryptographic data.
Severity ?
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
Credits
Wind Wong
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CVE-2026-3548 (GCVE-0-2026-3548)
Vulnerability from cvelistv5 – Published: 2026-03-19 17:45 – Updated: 2026-03-19 18:00
VLAI?
Title
Buffer overflow in CRL number parsing in wolfSSL
Summary
Two buffer overflow vulnerabilities existed in the wolfSSL CRL parser when parsing CRL numbers: a heap-based buffer overflow could occur when improperly storing the CRL number as a hexadecimal string, and a stack-based overflow for sufficiently sized CRL numbers. With appropriately crafted CRLs, either of these out of bound writes could be triggered. Note this only affects builds that specifically enable CRL support, and the user would need to load a CRL from an untrusted source.
Severity ?
Assigner
References
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CVE-2026-2646 (GCVE-0-2026-2646)
Vulnerability from cvelistv5 – Published: 2026-03-19 17:25 – Updated: 2026-03-19 17:44
VLAI?
Title
Heap buffer overflow in session parsing with wolfSSL_d2i_SSL_SESSION() function
Summary
A heap-buffer-overflow vulnerability exists in wolfSSL's wolfSSL_d2i_SSL_SESSION() function. When deserializing session data with SESSION_CERTS enabled, certificate and session id lengths are read from an untrusted input without bounds validation, allowing an attacker to overflow fixed-size buffers and corrupt heap memory. A maliciously crafted session would need to be loaded from an external source to trigger this vulnerability. Internal sessions were not vulnerable.
Severity ?
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
Credits
Jonathan Bar Or (@yo_yo_yo_jbo)
Haruto Kimura (Stella)
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CVE-2026-2645 (GCVE-0-2026-2645)
Vulnerability from cvelistv5 – Published: 2026-03-19 17:10 – Updated: 2026-03-19 17:45
VLAI?
Title
Acceptance of CertificateVerify Message before ClientKeyExchange in TLS 1.2
Summary
In wolfSSL 5.8.2 and earlier, a logic flaw existed in the TLS 1.2 server state machine implementation. The server could incorrectly accept the CertificateVerify message before the ClientKeyExchange message had been received. This issue affects wolfSSL before 5.8.4 (wolfSSL 5.8.2 and earlier is vulnerable, 5.8.4 is not vulnerable). In 5.8.4 wolfSSL would detect the issue later in the handshake. 5.9.0 was further hardened to catch the issue earlier in the handshake.
Severity ?
CWE
- CWE-358 - Improperly Implemented Security Check for Standard
Assigner
References
Date Public ?
2026-03-20 00:24
Credits
Kai Tian
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CVE-2026-1005 (GCVE-0-2026-1005)
Vulnerability from cvelistv5 – Published: 2026-03-19 17:00 – Updated: 2026-03-19 17:20
VLAI?
Title
Integer underflow leads to out-of-bounds access in sniffer AES-GCM/CCM/ARIA-GCM decrypt path
Summary
Integer underflow in wolfSSL packet sniffer <= 5.8.4 allows an attacker to cause a buffer overflow 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 heap buffer overflow and a 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
Prasanth Sundararajan
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CVE-2026-0819 (GCVE-0-2026-0819)
Vulnerability from cvelistv5 – Published: 2026-03-19 16:54 – Updated: 2026-03-19 17:19
VLAI?
Title
Stack buffer overflow in PKCS7 SignedData encoding with custom signed attributes
Summary
A stack buffer overflow vulnerability exists in wolfSSL's PKCS7 SignedData encoding functionality. In wc_PKCS7_BuildSignedAttributes(), when adding custom signed attributes, the code passes an incorrect capacity value (esd->signedAttribsCount) to EncodeAttributes() instead of the remaining available space in the fixed-size signedAttribs[7] array. When an application sets pkcs7->signedAttribsSz to a value greater than MAX_SIGNED_ATTRIBS_SZ (default 7) minus the number of default attributes already added, EncodeAttributes() writes beyond the array bounds, causing stack memory corruption. In WOLFSSL_SMALL_STACK builds, this becomes heap corruption. Exploitation requires an application that allows untrusted input to control the signedAttribs array size when calling wc_PKCS7_EncodeSignedData() or related signing functions.
Severity ?
Assigner
References
Credits
Maor Caplan
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CVE-2025-13912 (GCVE-0-2025-13912)
Vulnerability from cvelistv5 – Published: 2025-12-11 17:09 – Updated: 2025-12-11 19:35
VLAI?
Title
Potential non-constant time compiled code with Clang LLVM
Summary
Multiple constant-time implementations in wolfSSL before version 5.8.4 may be transformed into non-constant-time binary by LLVM optimizations, which can potentially result in observable timing discrepancies and lead to information disclosure through timing side-channel attacks.
Severity ?
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
Credits
Jing Liu
Zhiyuan Zhang
LUCÍA MARTÍNEZ GAVIER
Gilles Barthe
Marcel Böhme
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