CVE-2017-11428 | Multiple SAML libraries may allow authentication bypass via incorrect XML canonicalization and DOM traversal

Exp

OneLogin Ruby-SAML 1.6.0 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.

Published: 2019-04-17 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2017-11428 is rated High Exploit Risk (76.9/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.51%). 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.14% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2017-11428

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2017-11428

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.37% 2.51% +2.14%
2 2026-06-03 0.58% 0.37% -0.21%
3 2026-04-08 — 0.58% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2017-11428

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.7 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.1 4.0 [email protected]
9.8 3.0 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2017-11428

GitHub Security Advisory for CVE-2017-11428

GHSA-x2fr-v8wf-8wwv · Severity: high · Ecosystem: rubygems — Ruby-SAML Improper Authentication vulnerability

OS Trackers for CVE-2017-11428

vendor priority summary link
debian not yet assigned CVE-2017-11428 not yet assigned priority: Debian including 1 source packages (ruby-saml), 2 status rows across 2 suites (bookworm, bullseye): resolved 2. https://security-tracker.debian.org/tracker/CVE-2017-11428
ubuntu medium CVE-2017-11428 medium priority: Ubuntu including 1 source packages (ruby-saml), 18 status rows across 18 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, trusty, upstream, xenial): not-affected 14, released 2, DNE 1, ignored 1. https://ubuntu.com/security/CVE-2017-11428

Affected software / configurations for CVE-2017-11428

Vendor Product Version Raw CPE
onelogin ruby-saml <= 1.6.0 cpe:2.3:a:onelogin:ruby-saml:*:*:*:*:*:*:*:*

References for CVE-2017-11428

URL Tags
https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations Exploit Technical Description Third Party Advisory
https://www.kb.cert.org/vuls/id/475445 Third Party Advisory US Government Resource
cvelogic Threat Intelligence