CVE-2026-123542
📛 CVE Title
OpenAM before 16.1.4 PKCE Bypass in OAuth 2.0 Device Authorization Flow
Description
OpenAM before 16.1.4 fails to enforce PKCE in the OAuth 2.0 device authorization flow, never validating the code verifier when device codes are exchanged for tokens. Attackers who obtain an approved device code from client logs or shared device storage can redeem it for access and ID tokens to impersonate the user.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- VulnCheck
- CVSS severity
- HIGH
- CVSS score
- 7.6 / 10
- CVSS vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N- Effective score
- 7.6 / 10 HIGH source: CNA overview
- CWE(s)
-
CWE-358 - Reserved
- 2026-11-06
- Published
- 2026-11-08 01:37 UTC
- Last updated
- 2026-11-08 01:37 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/123xxx/CVE-2026-123542.json
- Linked Threat
- CVE-2026-123542 — OpenAM before 16.1.4 PKCE Bypass in OAuth 2.0 Device Authorization Flow
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-119427
EUVD enrichment is queued; refresh the page in a few seconds.
Affected products (1)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| OpenIdentityPlatform | OpenAM |
0 (affected),
16.1.4 (unaffected)
|
— |
Vendor references (2)
References embedded in the original CVE record by the assigning CNA.
- GitHub Security Advisory (GHSA-h93p-35jm-rj83) vendor-advisory
- VulnCheck Advisory: OpenAM before 16.1.4 PKCE Bypass in OAuth 2.0 Device Authorization Flow third-party-advisory
Web references (0)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
No web references attached yet.
Remediations (10)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:cvedatabase.com
Search and analyze CVE vulnerabilities with instant access to CVSS scores, affected products, and remediation guidance.
2026-11-08 10:25 UTC -
web:cyberupdates365.com
Track critical CVE vulnerabilities 2026 with verified enterprise patch guides. Fix zero-days across VMware, WordPress, Windows, and cloud infrastructure.
2026-11-08 10:25 UTC -
web:sec.cloudapps.cisco.com
As part of Cisco's ongoing commitment to proactive security and product quality, engineering teams conducted a comprehensive internal security review. This review resulted in software hardening releases that address multiple internally discovered vulnerabilities. These vulnerabilities were found during internal testing and are not known to be actively exploited. To assist customers in patching ...
2026-11-08 10:25 UTC -
web:senserva.com
Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.
2026-11-08 10:25 UTC -
web:support.servicenow.com
ServiceNow has addressed a critical vulnerability, tracked as CVE - 2026 -0542, that was identified in the ServiceNow AI Platform. This vulnerability could potentially enable an unauthenticated user, in certain
2026-11-08 10:25 UTC -
web:vulmon.com
Vulnerability Summary OpenAM versions prior to 16.1.4 improperly handle the OAuth 2.0 device authorization flow by failing to validate the code verifier during device code to token exchanges. Attackers can steal an approved device code from client logs or shared storage. This allows them to redeem the code for access and ID tokens, enabling user impersonation.
2026-11-08 10:25 UTC -
web:www.microsoft.com
If you can't patch immediately: Apply the PHP project's interim mitigations and the Azure WAF protections. Note: This reduces exposure but doesn't fix the underlying vulnerabilities.
2026-11-08 10:25 UTC -
web:www.openhands.dev
Compare 8 automated vulnerability remediation tools for 2026 on fixes, prioritization, integrations, and deployment control.
2026-11-08 10:25 UTC -
web:www.oracle.com
Prior Critical Patch Update and Critical Security Patch Update advisories should be reviewed for information regarding earlier published security patches. Refer to Critical Patch Updates, Critical Security Patch Updates, Security Alerts and Bulletins for information about Oracle Security advisories.
2026-11-08 10:25 UTC -
web:www.wiz.io
Wiz's CVE Database curates CVE data to create easy-to-navigate profiles that cover the entire vulnerability timeline, exploit scenarios, and mitigation steps.
2026-11-08 10:25 UTC
AI Forensic Analysis
Only Available for Registered Users. Sign in to view.
Raw JSON
The full cvelistV5 record. Download as CVE-2026-123542.json.
{
"containers": {
"cna": {
"affected": [
{
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"packageURL": "pkg:maven/org.openidentityplatform.openam/openam-oauth2",
"product": "OpenAM",
"vendor": "OpenIdentityPlatform",
"versions": [
{
"lessThan": "16.1.4",
"status": "affected",
"version": "0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "16.1.4",
"versionType": "semver"
}
]
}
],
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"operator": "OR"
}
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],
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],
"datePublic": "2026-10-22T00:00:00.000Z",
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}
],
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],
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},
{
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"tags": [
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"url": "https://www.vulncheck.com/advisories/openam-before-16.1.4-pkce-bypass-in-oauth-2.0-device-authorization-flow"
}
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"title": "OpenAM before 16.1.4 PKCE Bypass in OAuth 2.0 Device Authorization Flow",
"x_generator": {
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"datePublished": "2026-11-08T01:37:48.668Z",
"dateReserved": "2026-11-06T00:48:46.279Z",
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