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4 vulnerabilities found for CIRCL by Cloudflare

CVE-2026-1229 (GCVE-0-2026-1229)

Vulnerability from nvd – Published: 2026-02-24 07:58 – Updated: 2026-02-24 15:10
VLAI?
Title
Incorrect calculation in CIRCL secp384r1 CombinedMult
Summary
The CombinedMult function in the CIRCL ecc/p384 package (secp384r1 curve) produces an incorrect value for specific inputs. The issue is fixed by using complete addition formulas. ECDH and ECDSA signing relying on this curve are not affected. The bug was fixed in v1.6.3 https://github.com/cloudflare/circl/releases/tag/v1.6.3 .
CWE
Assigner
Impacted products
Vendor Product Version
Cloudflare CIRCL Affected: CIRCL up to version 1.6.2 , < 1.6.3 (custom)
Create a notification for this product.
Credits
Guido Vranken
Show details on NVD website

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CVE-2023-1732 (GCVE-0-2023-1732)

Vulnerability from nvd – Published: 2023-05-10 11:41 – Updated: 2025-01-27 18:32
VLAI?
Title
Improper random reading in CIRCL
Summary
When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether crypto/rand.Read() returns an error. In rare deployment cases (error thrown by the Read() function), this could lead to a predictable shared secret. The tkn20 and blindrsa components did not check whether enough randomness was returned from the user provided randomness source. Typically the user provides crypto/rand.Reader, which in the vast majority of cases will always return the right number random bytes. In the cases where it does not, or the user provides a source that does not, the blinding for blindrsa is weak and integrity of the plaintext is not ensured in tkn20.
CWE
  • CWE-20 - Improper Input Validation
  • CWE-755 - Improper Handling of Exceptional Conditions
Assigner
Impacted products
Vendor Product Version
Cloudflare CIRCL Affected: 0 , < <1.3.3 (semver)
Create a notification for this product.
Credits
Tom Thorogood
Show details on NVD website

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CVE-2026-1229 (GCVE-0-2026-1229)

Vulnerability from cvelistv5 – Published: 2026-02-24 07:58 – Updated: 2026-02-24 15:10
VLAI?
Title
Incorrect calculation in CIRCL secp384r1 CombinedMult
Summary
The CombinedMult function in the CIRCL ecc/p384 package (secp384r1 curve) produces an incorrect value for specific inputs. The issue is fixed by using complete addition formulas. ECDH and ECDSA signing relying on this curve are not affected. The bug was fixed in v1.6.3 https://github.com/cloudflare/circl/releases/tag/v1.6.3 .
CWE
Assigner
Impacted products
Vendor Product Version
Cloudflare CIRCL Affected: CIRCL up to version 1.6.2 , < 1.6.3 (custom)
Create a notification for this product.
Credits
Guido Vranken
Show details on NVD website

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CVE-2023-1732 (GCVE-0-2023-1732)

Vulnerability from cvelistv5 – Published: 2023-05-10 11:41 – Updated: 2025-01-27 18:32
VLAI?
Title
Improper random reading in CIRCL
Summary
When sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether crypto/rand.Read() returns an error. In rare deployment cases (error thrown by the Read() function), this could lead to a predictable shared secret. The tkn20 and blindrsa components did not check whether enough randomness was returned from the user provided randomness source. Typically the user provides crypto/rand.Reader, which in the vast majority of cases will always return the right number random bytes. In the cases where it does not, or the user provides a source that does not, the blinding for blindrsa is weak and integrity of the plaintext is not ensured in tkn20.
CWE
  • CWE-20 - Improper Input Validation
  • CWE-755 - Improper Handling of Exceptional Conditions
Assigner
Impacted products
Vendor Product Version
Cloudflare CIRCL Affected: 0 , < <1.3.3 (semver)
Create a notification for this product.
Credits
Tom Thorogood
Show details on NVD website

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              "value": "\u003cp\u003eWhen sampling randomness for a shared secret, the implementation of Kyber and FrodoKEM, did not check whether \u003ccode\u003ecrypto/rand.Read()\u003c/code\u003e\u0026nbsp;returns an error. In rare deployment cases (error thrown by the \u003ccode\u003eRead()\u003c/code\u003e\u0026nbsp;function), this could lead to a predictable shared secret.\u003c/p\u003e\u003cp\u003eThe tkn20 and blindrsa components did not check whether enough randomness was returned from the user provided randomness source. Typically the user provides \u003ccode\u003ecrypto/rand.Reader\u003c/code\u003e, which in the vast majority of cases will always return the right number random bytes. In the cases where it does not, or the user provides a source that does not, the blinding for blindrsa is weak and integrity of the plaintext is not ensured in tkn20.\u003c/p\u003e"
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      "impacts": [
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          "capecId": "CAPEC-620",
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            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
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              "cweId": "CWE-20",
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          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-755",
              "description": "CWE-755 Improper Handling of Exceptional Conditions",
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      "providerMetadata": {
        "dateUpdated": "2023-05-10T11:41:53.902Z",
        "orgId": "a22f1246-ba21-4bb4-a601-ad51614c1513",
        "shortName": "cloudflare"
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      "references": [
        {
          "url": "https://github.com/cloudflare/circl/security/advisories/GHSA-2q89-485c-9j2x"
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      "source": {
        "discovery": "EXTERNAL"
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      "title": "Improper random reading in CIRCL",
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    "dateReserved": "2023-03-30T15:16:57.957Z",
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