CVE-2026-48717Network attack vectorHinoki check available

OAuth token theft via omitted PKCE verifier

Published Sep 15, 2026 · Updated Sep 15, 2026

Improper authorization in Open Identity Platform OpenAM 16.0.6 and earlier allows remote attackers to redeem intercepted PKCE authorization codes. AuthorizationCodeGrantTypeHandler checks a stored code_challenge only when code_verifier is supplied unless realm-wide codeVerifierEnforced is enabled. The default disables enforcement; public-client exploitation requires an intercepted code, while confidential clients also require client authentication material or another redemption context.

CVSS severity6.5
Medium
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper authorization in Open Identity Platform OpenAM 16.0.6 and earlier allows remote attackers to redeem intercepted PKCE authorization codes. AuthorizationCodeGrantTypeHandler checks a stored code_challenge only when code_verifier is supplied unless realm-wide codeVerifierEnforced is enabled. The default disables enforcement; public-client exploitation requires an intercepted code, while confidential clients also require client authentication material or another redemption context.

The record

CVE
CVE-2026-48717
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Open Identity Platform
Product
OpenAM
Classifications
CWE-285, T1528
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 16.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Open Identity Platform · OpenAMversion=< 16.1.1

Published CVSS scores

6.5GitLab Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1528Steal Application Access Token

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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