All vulnerabilities
CVE-2026-105119GHSA-5p2f-7vcr-6vfh

OpenAM before 16.1.3 PKCE Enforcement Bypass via OAuth 2.0 Hybrid Flows

OpenIdentityPlatform OpenAM
Open in ThreatlineRecord JSON
CVSS
7.6High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.20%Chance of exploitation activity in the next 30 days, higher than 8% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in16.1.3Fixed versionCVE List
Published3 Oct 2026Updated 6 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

OpenAM before 16.1.3 applies its OAuth2 Provider PKCE enforcement only to authorization requests whose response_type is exactly code, so codes issued through OpenID Connect hybrid flows (code token, code id_token, code token id_token) carry no bound challenge. An attacker who intercepts such a code can redeem it for a public client's tokens with any non-empty code_verifier.

Text from CVE List

Affected versions 2

  • OpenAMaffected: all versions before 16.1.3CVE List
  • OpenAMunaffected: 16.1.3CVE List

References 2