CVE-2017-11427
highpriority · attend · 51EPSS 0.044 · 91 %ileexploit · PoCEUUSEPSS · scored 2026-10-27
OneLogin PythonSAML 2.3.0 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
- CHYbeta/CVE-2017-11427-DEMOThe Demo for CVE-2017-11427PoC · poc_in_github
affected products (3)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- GHSA-j8j8-348v-wfm3Python-saml allows manipulation of SAML data without invalidation of cryptographic signature2019-07-05ghsa · osvUS
OneLogin PythonSAML 2.3.0 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.
- PYSEC-2019-1982019-04-17vendor · osvUS
OneLogin PythonSAML 2.3.0 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.
also known as (6)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (9)
External citations — patches, advisories, analysis.
- https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementationscnnvd
- https://github.com/onelogin/python-samlPatchcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2017-11427cnnvd
- https://www.auscert.org.au/bulletins/ESB-2021.0090/cnnvd
- https://www.kb.cert.org/vuls/id/475445cnnvd
- https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementationsenisa_euvd
- https://www.kb.cert.org/vuls/id/475445enisa_euvd
- https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementationsExploitTechnical DescriptionThird Party Advisorynvd
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