Vulnerability Instance
Lookup for vulnerabilities affecting packages.
GET /api/vulnerabilities/35696?format=api
{ "url": "http://public2.vulnerablecode.io/api/vulnerabilities/35696?format=api", "vulnerability_id": "VCID-5ju3-cs33-8ygx", "summary": "tlslite-ng is an open source python library that implements SSL and TLS cryptographic protocols. In tlslite-ng before versions 0.7.6 and 0.8.0-alpha39, the code that performs decryption and padding check in RSA PKCS#1 v1.5 decryption is data dependant. In particular, the code has multiple ways in which it leaks information about the decrypted ciphertext. It aborts as soon as the plaintext doesn't start with 0x00, 0x02. All TLS servers that enable RSA key exchange as well as applications that use the RSA decryption API directly are vulnerable. This is patched in versions 0.7.6 and 0.8.0-alpha39. Note: the patches depend on Python processing the individual bytes in side-channel free manner, this is known to not the case (see reference). As such, users that require side-channel resistance are recommended to use different TLS implementations, as stated in the security policy of tlslite-ng.", "aliases": [ { "alias": "CVE-2020-26263" }, { "alias": "GHSA-wvcv-832q-fjg7" }, { "alias": "PYSEC-2020-143" } ], "fixed_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/19366?format=api", "purl": "pkg:pypi/tlslite-ng@0.7.6", "is_vulnerable": false, "affected_by_vulnerabilities": [], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.7.6" } ], "affected_packages": [ { "url": "http://public2.vulnerablecode.io/api/packages/222503?format=api", "purl": "pkg:pypi/tlslite-ng@0.5.0-beta1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.5.0-beta1" }, { "url": "http://public2.vulnerablecode.io/api/packages/222504?format=api", "purl": "pkg:pypi/tlslite-ng@0.5.0-beta2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.5.0-beta2" }, { "url": "http://public2.vulnerablecode.io/api/packages/222505?format=api", "purl": "pkg:pypi/tlslite-ng@0.5.0-beta3", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.5.0-beta3" }, { "url": "http://public2.vulnerablecode.io/api/packages/222506?format=api", "purl": "pkg:pypi/tlslite-ng@0.5.0-beta4", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.5.0-beta4" }, { "url": "http://public2.vulnerablecode.io/api/packages/222507?format=api", "purl": "pkg:pypi/tlslite-ng@0.5.0-beta5", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.5.0-beta5" }, { "url": "http://public2.vulnerablecode.io/api/packages/222508?format=api", "purl": "pkg:pypi/tlslite-ng@0.5.0-beta6", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.5.0-beta6" }, { "url": "http://public2.vulnerablecode.io/api/packages/222509?format=api", "purl": "pkg:pypi/tlslite-ng@0.6.0-alpha1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.6.0-alpha1" }, { "url": "http://public2.vulnerablecode.io/api/packages/222510?format=api", "purl": "pkg:pypi/tlslite-ng@0.6.0-alpha2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.6.0-alpha2" }, { "url": "http://public2.vulnerablecode.io/api/packages/222511?format=api", "purl": "pkg:pypi/tlslite-ng@0.6.0-alpha3", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.6.0-alpha3" }, { "url": "http://public2.vulnerablecode.io/api/packages/222512?format=api", "purl": "pkg:pypi/tlslite-ng@0.6.0-alpha4", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.6.0-alpha4" }, { "url": "http://public2.vulnerablecode.io/api/packages/222513?format=api", "purl": "pkg:pypi/tlslite-ng@0.6.0-alpha5", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.6.0-alpha5" }, { "url": "http://public2.vulnerablecode.io/api/packages/222514?format=api", "purl": "pkg:pypi/tlslite-ng@0.6.0-beta1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.6.0-beta1" }, { "url": "http://public2.vulnerablecode.io/api/packages/222515?format=api", "purl": "pkg:pypi/tlslite-ng@0.7.0-alpha1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.7.0-alpha1" }, { "url": "http://public2.vulnerablecode.io/api/packages/222516?format=api", "purl": "pkg:pypi/tlslite-ng@0.7.0-alpha2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.7.0-alpha2" }, { "url": "http://public2.vulnerablecode.io/api/packages/222517?format=api", "purl": "pkg:pypi/tlslite-ng@0.7.0-alpha3", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.7.0-alpha3" }, { "url": "http://public2.vulnerablecode.io/api/packages/222518?format=api", "purl": "pkg:pypi/tlslite-ng@0.7.0-alpha4", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.7.0-alpha4" }, { "url": "http://public2.vulnerablecode.io/api/packages/222519?format=api", "purl": "pkg:pypi/tlslite-ng@0.7.0-alpha5", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.7.0-alpha5" }, { "url": "http://public2.vulnerablecode.io/api/packages/222520?format=api", "purl": "pkg:pypi/tlslite-ng@0.7.0-alpha6", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.7.0-alpha6" }, { "url": "http://public2.vulnerablecode.io/api/packages/222521?format=api", "purl": "pkg:pypi/tlslite-ng@0.7.0-alpha7", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.7.0-alpha7" }, { "url": "http://public2.vulnerablecode.io/api/packages/222522?format=api", "purl": "pkg:pypi/tlslite-ng@0.7.0-alpha8", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.7.0-alpha8" }, { "url": "http://public2.vulnerablecode.io/api/packages/222523?format=api", "purl": "pkg:pypi/tlslite-ng@0.7.0-alpha9", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.7.0-alpha9" }, { "url": "http://public2.vulnerablecode.io/api/packages/222524?format=api", "purl": "pkg:pypi/tlslite-ng@0.7.0-beta1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.7.0-beta1" }, { "url": "http://public2.vulnerablecode.io/api/packages/11382?format=api", "purl": "pkg:pypi/tlslite-ng@0.5.0b1", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.5.0b1" }, { "url": "http://public2.vulnerablecode.io/api/packages/11383?format=api", "purl": "pkg:pypi/tlslite-ng@0.5.0b2", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.5.0b2" }, { "url": "http://public2.vulnerablecode.io/api/packages/11384?format=api", "purl": "pkg:pypi/tlslite-ng@0.5.0b3", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": "http://public2.vulnerablecode.io/packages/pkg:pypi/tlslite-ng@0.5.0b3" }, { "url": "http://public2.vulnerablecode.io/api/packages/11385?format=api", "purl": "pkg:pypi/tlslite-ng@0.5.0b4", "is_vulnerable": true, "affected_by_vulnerabilities": [ { "vulnerability": "VCID-5ju3-cs33-8ygx" }, { "vulnerability": "VCID-q2yu-yvd5-sbhs" } ], "resource_url": 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"https://api.first.org/data/v1/epss?cve=CVE-2020-26263", "reference_id": "", "reference_type": "", "scores": [ { "value": "0.00244", "scoring_system": "epss", "scoring_elements": "0.47887", "published_at": "2026-06-04T12:55:00Z" } ], "url": "https://api.first.org/data/v1/epss?cve=CVE-2020-26263" }, { "reference_url": "https://github.com/pypa/advisory-database/tree/main/vulns/tlslite-ng/PYSEC-2020-143.yaml", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/pypa/advisory-database/tree/main/vulns/tlslite-ng/PYSEC-2020-143.yaml" }, { "reference_url": "https://github.com/tlsfuzzer/tlslite-ng", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/tlsfuzzer/tlslite-ng" }, { "reference_url": "https://github.com/tlsfuzzer/tlslite-ng/commit/c28d6d387bba59d8bd5cb3ba15edc42edf54b368", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/tlsfuzzer/tlslite-ng/commit/c28d6d387bba59d8bd5cb3ba15edc42edf54b368" }, { "reference_url": "https://github.com/tlsfuzzer/tlslite-ng/pull/438", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/tlsfuzzer/tlslite-ng/pull/438" }, { "reference_url": "https://github.com/tlsfuzzer/tlslite-ng/pull/439", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/tlsfuzzer/tlslite-ng/pull/439" }, { "reference_url": "https://github.com/tlsfuzzer/tlslite-ng/security/advisories/GHSA-wvcv-832q-fjg7", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://github.com/tlsfuzzer/tlslite-ng/security/advisories/GHSA-wvcv-832q-fjg7" }, { "reference_url": "https://pypi.org/project/tlslite-ng", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://pypi.org/project/tlslite-ng" }, { "reference_url": "https://pypi.org/project/tlslite-ng/", "reference_id": "", "reference_type": "", "scores": [], "url": "https://pypi.org/project/tlslite-ng/" }, { "reference_url": "https://securitypitfalls.wordpress.com/2018/08/03/constant-time-compare-in-python", "reference_id": "", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://securitypitfalls.wordpress.com/2018/08/03/constant-time-compare-in-python" }, { "reference_url": "https://securitypitfalls.wordpress.com/2018/08/03/constant-time-compare-in-python/", "reference_id": "", "reference_type": "", "scores": [], "url": "https://securitypitfalls.wordpress.com/2018/08/03/constant-time-compare-in-python/" }, { "reference_url": "https://nvd.nist.gov/vuln/detail/CVE-2020-26263", "reference_id": "CVE-2020-26263", "reference_type": "", "scores": [ { "value": "7.5", "scoring_system": "cvssv3.1", "scoring_elements": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N" }, { "value": "8.7", "scoring_system": "cvssv4", "scoring_elements": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N" }, { "value": "HIGH", "scoring_system": "generic_textual", "scoring_elements": "" } ], "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-26263" }, { "reference_url": "https://github.com/advisories/GHSA-wvcv-832q-fjg7", "reference_id": "GHSA-wvcv-832q-fjg7", "reference_type": "", "scores": [], "url": "https://github.com/advisories/GHSA-wvcv-832q-fjg7" } ], "weaknesses": [ { "cwe_id": 326, "name": "Inadequate Encryption Strength", "description": "The product stores or transmits sensitive data using an encryption scheme that is theoretically sound, but is not strong enough for the level of protection required." }, { "cwe_id": 937, "name": "OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities", "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2013." }, { "cwe_id": 1035, "name": "OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities", "description": "Weaknesses in this category are related to the A9 category in the OWASP Top Ten 2017." } ], "exploits": [], "severity_range_score": "7.0 - 8.9", "exploitability": "0.5", "weighted_severity": "8.0", "risk_score": 4.0, "resource_url": "http://public2.vulnerablecode.io/vulnerabilities/VCID-5ju3-cs33-8ygx" }