Vulnerability-Lookup

GHSA-2W8X-224X-785M

Vulnerability from github – Published: 2026-03-17 06:31 – Updated: 2026-03-25 14:36

Summary

sjcl is missing point-on-curve validation in sjcl.ecc.basicKey.publicKey

Details

All versions of the package sjcl are vulnerable to Improper Verification of Cryptographic Signature due to missing point-on-curve validation in sjcl.ecc.basicKey.publicKey(). An attacker can recover a victim's ECDH private key by sending crafted off-curve public keys and observing ECDH outputs. The dhJavaEc() function directly returns the raw x-coordinate of the scalar multiplication result (no hashing), providing a plaintext oracle without requiring any decryption feedback.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

7.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.0.8"
      },
      "package": {
        "ecosystem": "npm",
        "name": "sjcl"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-4258"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-325",
      "CWE-347"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-18T16:10:06Z",
    "nvd_published_at": "2026-03-17T06:16:18Z",
    "severity": "HIGH"
  },
  "details": "All versions of the package sjcl are vulnerable to Improper Verification of Cryptographic Signature due to missing point-on-curve validation in sjcl.ecc.basicKey.publicKey(). An attacker can recover a victim\u0027s ECDH private key by sending crafted off-curve public keys and observing ECDH outputs. The dhJavaEc() function directly returns the raw x-coordinate of the scalar multiplication result (no hashing), providing a plaintext oracle without requiring any decryption feedback.",
  "id": "GHSA-2w8x-224x-785m",
  "modified": "2026-03-25T14:36:28Z",
  "published": "2026-03-17T06:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4258"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwiseshiftleft/sjcl/commit/ee307459972442a17beebc29dc331fffd8aff796"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/Kr0emer/2560f98edb10b0b34f2438cd63913c47"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/bitwiseshiftleft/sjcl"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwiseshiftleft/sjcl/blob/master/core/ecc.js#L454-L461"
    },
    {
      "type": "WEB",
      "url": "https://security.snyk.io/vuln/SNYK-JS-SJCL-15369617"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "sjcl is missing point-on-curve validation in sjcl.ecc.basicKey.publicKey"
}

CVE-2026-4258 (GCVE-0-2026-4258)

Vulnerability from cvelistv5 – Published: 2026-03-17 05:00 – Updated: 2026-08-07 15:25

Summary

Versions of the package sjcl before 1.0.9 are vulnerable to Improper Verification of Cryptographic Signature due to missing point-on-curve validation in sjcl.ecc.basicKey.publicKey(). An attacker can recover a victim's ECDH private key by sending crafted off-curve public keys and observing ECDH outputs. The dhJavaEc() function directly returns the raw x-coordinate of the scalar multiplication result (no hashing), providing a plaintext oracle without requiring any decryption feedback.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-17 13:22 UTC

CWE

CWE-347 - Improper Verification of Cryptographic Signature
CWE-325 - Missing Cryptographic Step

Assigner

snyk mitre root

References

5 references

URL	Tags
https://security.snyk.io/vuln/SNYK-JS-SJCL-15369617
https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJAR…
https://gist.github.com/Kr0emer/2560f98edb10b0b34…
https://github.com/bitwiseshiftleft/sjcl/blob/mas…
https://github.com/bitwiseshiftleft/sjcl/commit/e…

Impacted products

2 products

Vendor	Product	Version
n/a	sjcl	Affected: 0 , < 1.0.9 (semver)
n/a	org.webjars.npm:sjcl	Affected: 0 , < * (semver)

Credits

Kr0emer

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-4258",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-03-17T13:22:02.709429Z",
                "version": "2.0.3"
              },
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            "descriptions": [
              {
                "cweId": "CWE-325",
                "description": "CWE-325 Missing Cryptographic Step",
                "lang": "en",
                "type": "CWE"
              }
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        "providerMetadata": {
          "dateUpdated": "2026-03-17T13:22:11.049Z",
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          "shortName": "CISA-ADP"
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        "references": [
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            "tags": [
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            "url": "https://gist.github.com/Kr0emer/2560f98edb10b0b34f2438cd63913c47"
          },
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            ],
            "url": "https://security.snyk.io/vuln/SNYK-JS-SJCL-15369617"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "sjcl",
          "vendor": "n/a",
          "versions": [
            {
              "lessThan": "1.0.9",
              "status": "affected",
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      "credits": [
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      ],
      "metrics": [
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            "attackComplexity": "LOW",
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            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "exploitCodeMaturity": "PROOF_OF_CONCEPT",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P",
            "version": "3.1"
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          "cvssV4_0": {
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            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
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      "providerMetadata": {
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      "references": [
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          "url": "https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-15751243"
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  "cveMetadata": {
    "assignerOrgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730",
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    "datePublished": "2026-03-17T05:00:04.199Z",
    "dateReserved": "2026-03-16T10:00:53.239Z",
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}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.