What is CVE-2026-46490?

samlify is a Node.js library for SAML single sign-on. Prior to version 2.13.0, samlify’s template substitution only escapes attribute contexts. Values inserted into element text (e.g., ) are not escaped. A normal user can inject XML markup into an attribute value (e.g., email, name) and add new elements inside the signed assertion. The IdP then signs the tampered assertion and the SP accepts the injected attributes as trusted. This allows privilege escalation when attributes are used for authorization (roles/groups). This issue has been patched in version 2.13.0.

How severe is CVE-2026-46490?

CVE-2026-46490 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-46490 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-46490?

CVE-2026-46490 affects Samlify Project Samlify. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-46490?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-46490 have an EU (EUVD) identifier?

Yes. CVE-2026-46490 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35188.

When was CVE-2026-46490 published?

CVE-2026-46490 was published on 2026-06-08 and last updated on 2026-06-17.

CVE-2026-46490

CVE-2026-46490 is a high-severity vulnerability in Samlify Project Samlify with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-91.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35188
Weakness: CWE-91
Affected product: Samlify Project Samlify
Published: 2026-06-08
Last modified: 2026-06-17

Description

samlify is a Node.js library for SAML single sign-on. Prior to version 2.13.0, samlify’s template substitution only escapes attribute contexts. Values inserted into element text (e.g., <saml:AttributeValue>) are not escaped. A normal user can inject XML markup into an attribute value (e.g., email, name) and add new <saml:Attribute> elements inside the signed assertion. The IdP then signs the tampered assertion and the SP accepts the injected attributes as trusted. This allows privilege escalation when attributes are used for authorization (roles/groups). This issue has been patched in version 2.13.0.

Frequently asked questions

What is CVE-2026-46490?: samlify is a Node.js library for SAML single sign-on. Prior to version 2.13.0, samlify’s template substitution only escapes attribute contexts. Values inserted into element text (e.g., <saml:AttributeValue>) are not escaped. A normal user can inject XML markup into an attribute value (e.g., email, name) and add new <saml:Attribute> elements inside the signed assertion. The IdP then signs the tampered assertion and the SP accepts the injected attributes as trusted. This allows privilege escalation when attributes are used for authorization (roles/groups). This issue has been patched in version 2.13.0.
How severe is CVE-2026-46490?: CVE-2026-46490 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-46490 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-46490?: CVE-2026-46490 affects Samlify Project Samlify. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-46490?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-46490 have an EU (EUVD) identifier?: Yes. CVE-2026-46490 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35188.
When was CVE-2026-46490 published?: CVE-2026-46490 was published on 2026-06-08 and last updated on 2026-06-17.

References

https://github.com/tngan/samlify/security/advisories/GHSA-34r5-q4jw-r36m

Affected products (1)

cpe:2.3:a:samlify_project:samlify:*:*:*:*:*:*:*:*

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