Vulnerability-Lookup

CVE-2026-4395 (GCVE-0-2026-4395)

Vulnerability from cvelistv5 – Published: 2026-03-19 20:41 – Updated: 2026-03-20 17:09

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 ?

1.3 (Low)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/AU:Y/R:U/V:D/RE:L/U:Amber

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

wolfSSL

References

URL

Tags

https://github.com/wolfSSL/wolfssl/pull/9988

patch

Impacted products

	Vendor	Product	Version
	wolfSSL	wolfssl	Affected: 0 , ≤ 5.8.4 (semver)

Credits

Haruto Kimura (Stella)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-4395

Vulnerability from fkie_nvd - Published: 2026-03-19 21:17 - Updated: 2026-03-20 13:39

Severity ?

1.3 (Low) - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/AU:Y/R:U/V:D/RE:L/U:Amber

Summary

References

	URL	Tags
	facts@wolfssl.com	https://github.com/wolfSSL/wolfssl/pull/9988

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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      "lang": "en",
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  "id": "CVE-2026-4395",
  "lastModified": "2026-03-20T13:39:46.493",
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          "confidentialityRequirement": "NOT_DEFINED",
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          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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GHSA-CQX9-3CPJ-RRQP

Vulnerability from github – Published: 2026-03-19 21:30 – Updated: 2026-03-19 21:30

Details

Severity ?

1.3 (Low)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/AU:Y/R:U/V:D/RE:L/U:Amber

Show details on source website

JSON

To clipboard

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  "affected": [],
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    "CVE-2026-4395"
  ],
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-19T21:17:13Z",
    "severity": "LOW"
  },
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  "id": "GHSA-cqx9-3cpj-rrqp",
  "modified": "2026-03-19T21:30:25Z",
  "published": "2026-03-19T21:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4395"
    },
    {
      "type": "WEB",
      "url": "https://github.com/wolfSSL/wolfssl/pull/9988"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:D/RE:L/U:Amber",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-4395 (GCVE-0-2026-4395)

FKIE_CVE-2026-4395

GHSA-CQX9-3CPJ-RRQP

Tags

Sightings

Nomenclature