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PYSEC-2017-24
Vulnerability from pysec - Published: 2017-08-24 16:29 - Updated: 2021-07-05 00:01
VLAI
Details
In PyJWT 1.5.0 and below the invalid_strings check in HMACAlgorithm.prepare_key does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string -----BEGIN RSA PUBLIC KEY----- which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
Impacted products
| Name | purl | pyjwt | pkg:pypi/pyjwt |
|---|
Aliases
{
"affected": [
{
"package": {
"ecosystem": "PyPI",
"name": "pyjwt",
"purl": "pkg:pypi/pyjwt"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.5.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.1.1",
"0.1.2",
"0.1.3",
"0.1.4",
"0.1.5",
"0.1.6",
"0.1.7",
"0.1.8",
"0.1.9",
"0.2.0",
"0.2.1",
"0.2.3",
"0.3.0",
"0.3.1",
"0.3.2",
"0.4.0",
"0.4.1",
"0.4.2",
"0.4.3",
"1.0.0",
"1.0.1",
"1.1.0",
"1.3.0",
"1.4.0",
"1.4.1",
"1.4.2",
"1.5.0"
]
}
],
"aliases": [
"CVE-2017-11424",
"GHSA-r9jw-mwhq-wp62"
],
"details": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.",
"id": "PYSEC-2017-24",
"modified": "2021-07-05T00:01:24.915848Z",
"published": "2017-08-24T16:29:00Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/jpadilla/pyjwt/pull/277"
},
{
"type": "ADVISORY",
"url": "http://www.debian.org/security/2017/dsa-3979"
},
{
"type": "ADVISORY",
"url": "https://github.com/advisories/GHSA-r9jw-mwhq-wp62"
}
]
}
BREW-AZURE-CLI-CVE-2017-11424 (GHSA-R9JW-MWHQ-WP62)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:37 – Updated: 2026-09-09 23:43 – Source website
VLAI
Summary
PyJWT vulnerable to key confusion attacks
Details
In PyJWT 1.5.0 and below the invalid_strings check in HMACAlgorithm.prepare_key does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string -----BEGIN RSA PUBLIC KEY----- which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
Severity
7.5 (High)
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "PyJWT",
"resource_purl": "pkg:pypi/pyjwt@2.13.0",
"upstream_fixed_in": "1.5.1"
},
"package": {
"ecosystem": "Homebrew",
"name": "azure-cli",
"purl": "pkg:brew/azure-cli"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.89.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyjwt@2.13.0",
"name": "pyjwt",
"resource": "PyJWT",
"strategy": "registry",
"subject_version": "2.13.0"
}
]
},
"details": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.",
"id": "BREW-azure-cli-CVE-2017-11424",
"modified": "2026-09-09T23:43:05Z",
"published": "2026-08-13T16:37:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-11424"
},
{
"type": "WEB",
"url": "https://github.com/jpadilla/pyjwt/pull/277"
},
{
"type": "PACKAGE",
"url": "https://github.com/jpadilla/pyjwt"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2017-24.yaml"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3979"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "PyJWT vulnerable to key confusion attacks",
"upstream": [
"GHSA-r9jw-mwhq-wp62",
"CVE-2017-11424",
"PYSEC-2017-24"
]
}
BREW-BBOT-CVE-2017-11424 (GHSA-R9JW-MWHQ-WP62)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:37 – Updated: 2026-09-09 23:43 – Source website
VLAI
Summary
PyJWT vulnerable to key confusion attacks
Details
In PyJWT 1.5.0 and below the invalid_strings check in HMACAlgorithm.prepare_key does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string -----BEGIN RSA PUBLIC KEY----- which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
Severity
7.5 (High)
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyjwt",
"resource_purl": "pkg:pypi/pyjwt@2.13.0",
"upstream_fixed_in": "1.5.1"
},
"package": {
"ecosystem": "Homebrew",
"name": "bbot",
"purl": "pkg:brew/bbot"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.0.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyjwt@2.13.0",
"name": "pyjwt",
"resource": "pyjwt",
"strategy": "registry",
"subject_version": "2.13.0"
}
]
},
"details": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.",
"id": "BREW-bbot-CVE-2017-11424",
"modified": "2026-09-09T23:43:32Z",
"published": "2026-08-13T16:37:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-11424"
},
{
"type": "WEB",
"url": "https://github.com/jpadilla/pyjwt/pull/277"
},
{
"type": "PACKAGE",
"url": "https://github.com/jpadilla/pyjwt"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2017-24.yaml"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3979"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "PyJWT vulnerable to key confusion attacks",
"upstream": [
"GHSA-r9jw-mwhq-wp62",
"CVE-2017-11424",
"PYSEC-2017-24"
]
}
BREW-CONAN@1-CVE-2017-11424 (GHSA-R9JW-MWHQ-WP62)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:41 – Updated: 2026-09-09 23:48 – Source website
VLAI
Summary
PyJWT vulnerable to key confusion attacks
Details
In PyJWT 1.5.0 and below the invalid_strings check in HMACAlgorithm.prepare_key does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string -----BEGIN RSA PUBLIC KEY----- which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
Severity
7.5 (High)
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyjwt",
"resource_purl": "pkg:pypi/pyjwt@2.10.1",
"upstream_fixed_in": "1.5.1"
},
"package": {
"ecosystem": "Homebrew",
"name": "conan@1",
"purl": "pkg:brew/conan%401"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.66.0_3"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyjwt@2.10.1",
"name": "pyjwt",
"resource": "pyjwt",
"strategy": "registry",
"subject_version": "2.10.1"
}
]
},
"details": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.",
"id": "BREW-conan@1-CVE-2017-11424",
"modified": "2026-09-09T23:48:38Z",
"published": "2026-08-13T16:41:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-11424"
},
{
"type": "WEB",
"url": "https://github.com/jpadilla/pyjwt/pull/277"
},
{
"type": "PACKAGE",
"url": "https://github.com/jpadilla/pyjwt"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2017-24.yaml"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3979"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "PyJWT vulnerable to key confusion attacks",
"upstream": [
"GHSA-r9jw-mwhq-wp62",
"CVE-2017-11424",
"PYSEC-2017-24"
]
}
BREW-CYCODE-CVE-2017-11424 (GHSA-R9JW-MWHQ-WP62)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:42 – Updated: 2026-09-16 08:55 – Source website
VLAI
Summary
PyJWT vulnerable to key confusion attacks
Details
In PyJWT 1.5.0 and below the invalid_strings check in HMACAlgorithm.prepare_key does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string -----BEGIN RSA PUBLIC KEY----- which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
Severity
7.5 (High)
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyjwt",
"resource_purl": "pkg:pypi/pyjwt@2.14.0",
"upstream_fixed_in": "1.5.1"
},
"package": {
"ecosystem": "Homebrew",
"name": "cycode",
"purl": "pkg:brew/cycode"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.19.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyjwt@2.14.0",
"name": "pyjwt",
"resource": "pyjwt",
"strategy": "registry",
"subject_version": "2.14.0"
}
]
},
"details": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.",
"id": "BREW-cycode-CVE-2017-11424",
"modified": "2026-09-16T08:55:38Z",
"published": "2026-08-13T16:42:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-11424"
},
{
"type": "WEB",
"url": "https://github.com/jpadilla/pyjwt/pull/277"
},
{
"type": "PACKAGE",
"url": "https://github.com/jpadilla/pyjwt"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2017-24.yaml"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3979"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "PyJWT vulnerable to key confusion attacks",
"upstream": [
"GHSA-r9jw-mwhq-wp62",
"CVE-2017-11424",
"PYSEC-2017-24"
]
}
BREW-DNSROBOCERT-CVE-201… (GHSA-R9JW-MWHQ-WP62)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:43 – Updated: 2026-09-09 23:51 – Source website
VLAI
Summary
PyJWT vulnerable to key confusion attacks
Details
In PyJWT 1.5.0 and below the invalid_strings check in HMACAlgorithm.prepare_key does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string -----BEGIN RSA PUBLIC KEY----- which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
Severity
7.5 (High)
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyjwt",
"resource_purl": "pkg:pypi/pyjwt@2.13.0",
"upstream_fixed_in": "1.5.1"
},
"package": {
"ecosystem": "Homebrew",
"name": "dnsrobocert",
"purl": "pkg:brew/dnsrobocert"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.27.1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyjwt@2.13.0",
"name": "pyjwt",
"resource": "pyjwt",
"strategy": "registry",
"subject_version": "2.13.0"
}
]
},
"details": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.",
"id": "BREW-dnsrobocert-CVE-2017-11424",
"modified": "2026-09-09T23:51:44Z",
"published": "2026-08-13T16:43:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-11424"
},
{
"type": "WEB",
"url": "https://github.com/jpadilla/pyjwt/pull/277"
},
{
"type": "PACKAGE",
"url": "https://github.com/jpadilla/pyjwt"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2017-24.yaml"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3979"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "PyJWT vulnerable to key confusion attacks",
"upstream": [
"GHSA-r9jw-mwhq-wp62",
"CVE-2017-11424",
"PYSEC-2017-24"
]
}
BREW-DSTACK-CVE-2017-11424 (GHSA-R9JW-MWHQ-WP62)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:43 – Updated: 2026-09-09 23:52 – Source website
VLAI
Summary
PyJWT vulnerable to key confusion attacks
Details
In PyJWT 1.5.0 and below the invalid_strings check in HMACAlgorithm.prepare_key does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string -----BEGIN RSA PUBLIC KEY----- which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
Severity
7.5 (High)
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyjwt",
"resource_purl": "pkg:pypi/pyjwt@2.13.0",
"upstream_fixed_in": "1.5.1"
},
"package": {
"ecosystem": "Homebrew",
"name": "dstack",
"purl": "pkg:brew/dstack"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.21.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyjwt@2.13.0",
"name": "pyjwt",
"resource": "pyjwt",
"strategy": "registry",
"subject_version": "2.13.0"
}
]
},
"details": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.",
"id": "BREW-dstack-CVE-2017-11424",
"modified": "2026-09-09T23:52:28Z",
"published": "2026-08-13T16:43:57Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-11424"
},
{
"type": "WEB",
"url": "https://github.com/jpadilla/pyjwt/pull/277"
},
{
"type": "PACKAGE",
"url": "https://github.com/jpadilla/pyjwt"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2017-24.yaml"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3979"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "PyJWT vulnerable to key confusion attacks",
"upstream": [
"GHSA-r9jw-mwhq-wp62",
"CVE-2017-11424",
"PYSEC-2017-24"
]
}
BREW-DUPLICITY-CVE-2017-11424 (GHSA-R9JW-MWHQ-WP62)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:44 – Updated: 2026-09-09 23:52 – Source website
VLAI
Summary
PyJWT vulnerable to key confusion attacks
Details
In PyJWT 1.5.0 and below the invalid_strings check in HMACAlgorithm.prepare_key does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string -----BEGIN RSA PUBLIC KEY----- which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
Severity
7.5 (High)
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyjwt",
"resource_purl": "pkg:pypi/pyjwt@2.13.0",
"upstream_fixed_in": "1.5.1"
},
"package": {
"ecosystem": "Homebrew",
"name": "duplicity",
"purl": "pkg:brew/duplicity"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.1.0_2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyjwt@2.13.0",
"name": "pyjwt",
"resource": "pyjwt",
"strategy": "registry",
"subject_version": "2.13.0"
}
]
},
"details": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.",
"id": "BREW-duplicity-CVE-2017-11424",
"modified": "2026-09-09T23:52:33Z",
"published": "2026-08-13T16:44:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-11424"
},
{
"type": "WEB",
"url": "https://github.com/jpadilla/pyjwt/pull/277"
},
{
"type": "PACKAGE",
"url": "https://github.com/jpadilla/pyjwt"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2017-24.yaml"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3979"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "PyJWT vulnerable to key confusion attacks",
"upstream": [
"GHSA-r9jw-mwhq-wp62",
"CVE-2017-11424",
"PYSEC-2017-24"
]
}
BREW-DVC-CVE-2017-11424 (GHSA-R9JW-MWHQ-WP62)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:44 – Updated: 2026-09-09 23:52 – Source website
VLAI
Summary
PyJWT vulnerable to key confusion attacks
Details
In PyJWT 1.5.0 and below the invalid_strings check in HMACAlgorithm.prepare_key does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string -----BEGIN RSA PUBLIC KEY----- which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
Severity
7.5 (High)
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyjwt",
"resource_purl": "pkg:pypi/pyjwt@2.13.0",
"upstream_fixed_in": "1.5.1"
},
"package": {
"ecosystem": "Homebrew",
"name": "dvc",
"purl": "pkg:brew/dvc"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.67.1_14"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyjwt@2.13.0",
"name": "pyjwt",
"resource": "pyjwt",
"strategy": "registry",
"subject_version": "2.13.0"
}
]
},
"details": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.",
"id": "BREW-dvc-CVE-2017-11424",
"modified": "2026-09-09T23:52:57Z",
"published": "2026-08-13T16:44:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-11424"
},
{
"type": "WEB",
"url": "https://github.com/jpadilla/pyjwt/pull/277"
},
{
"type": "PACKAGE",
"url": "https://github.com/jpadilla/pyjwt"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2017-24.yaml"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3979"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "PyJWT vulnerable to key confusion attacks",
"upstream": [
"GHSA-r9jw-mwhq-wp62",
"CVE-2017-11424",
"PYSEC-2017-24"
]
}
BREW-EVERNOTE-BACKUP-CVE… (GHSA-R9JW-MWHQ-WP62)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:45 – Updated: 2026-09-09 23:53 – Source website
VLAI
Summary
PyJWT vulnerable to key confusion attacks
Details
In PyJWT 1.5.0 and below the invalid_strings check in HMACAlgorithm.prepare_key does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string -----BEGIN RSA PUBLIC KEY----- which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
Severity
7.5 (High)
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyjwt",
"resource_purl": "pkg:pypi/pyjwt@2.13.0",
"upstream_fixed_in": "1.5.1"
},
"package": {
"ecosystem": "Homebrew",
"name": "evernote-backup",
"purl": "pkg:brew/evernote-backup"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.14.0_1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyjwt@2.13.0",
"name": "pyjwt",
"resource": "pyjwt",
"strategy": "registry",
"subject_version": "2.13.0"
}
]
},
"details": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.",
"id": "BREW-evernote-backup-CVE-2017-11424",
"modified": "2026-09-09T23:53:51Z",
"published": "2026-08-13T16:45:10Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-11424"
},
{
"type": "WEB",
"url": "https://github.com/jpadilla/pyjwt/pull/277"
},
{
"type": "PACKAGE",
"url": "https://github.com/jpadilla/pyjwt"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2017-24.yaml"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3979"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "PyJWT vulnerable to key confusion attacks",
"upstream": [
"GHSA-r9jw-mwhq-wp62",
"CVE-2017-11424",
"PYSEC-2017-24"
]
}
BREW-FASTMCP-CVE-2017-11424 (GHSA-R9JW-MWHQ-WP62)
Vulnerability from osv_homebrew – Published: 2026-08-13 16:46 – Updated: 2026-09-09 23:56 – Source website
VLAI
Summary
PyJWT vulnerable to key confusion attacks
Details
In PyJWT 1.5.0 and below the invalid_strings check in HMACAlgorithm.prepare_key does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string -----BEGIN RSA PUBLIC KEY----- which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.
Severity
7.5 (High)
{
"affected": [
{
"ecosystem_specific": {
"fix": "bump",
"range_state": "fixed",
"resource": "pyjwt",
"resource_purl": "pkg:pypi/pyjwt@2.13.0",
"upstream_fixed_in": "1.5.1"
},
"package": {
"ecosystem": "Homebrew",
"name": "fastmcp",
"purl": "pkg:brew/fastmcp"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.4.7"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"confidence": "high",
"source": "matched",
"strategy": "registry",
"upstream_evidence": [
{
"ecosystem": "PyPI",
"key": "pkg:pypi/pyjwt@2.13.0",
"name": "pyjwt",
"resource": "pyjwt",
"strategy": "registry",
"subject_version": "2.13.0"
}
]
},
"details": "In PyJWT 1.5.0 and below the `invalid_strings` check in `HMACAlgorithm.prepare_key` does not account for all PEM encoded public keys. Specifically, the PKCS1 PEM encoded format would be allowed because it is prefaced with the string `-----BEGIN RSA PUBLIC KEY-----` which is not accounted for. This enables symmetric/asymmetric key confusion attacks against users using the PKCS1 PEM encoded public keys, which would allow an attacker to craft JWTs from scratch.",
"id": "BREW-fastmcp-CVE-2017-11424",
"modified": "2026-09-09T23:56:32Z",
"published": "2026-08-13T16:46:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-11424"
},
{
"type": "WEB",
"url": "https://github.com/jpadilla/pyjwt/pull/277"
},
{
"type": "PACKAGE",
"url": "https://github.com/jpadilla/pyjwt"
},
{
"type": "WEB",
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/pyjwt/PYSEC-2017-24.yaml"
},
{
"type": "WEB",
"url": "http://www.debian.org/security/2017/dsa-3979"
}
],
"schema_version": "1.7.3",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "PyJWT vulnerable to key confusion attacks",
"upstream": [
"GHSA-r9jw-mwhq-wp62",
"CVE-2017-11424",
"PYSEC-2017-24"
]
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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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.
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.
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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.
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