Security readout for executives and security teams
A flaw in Apache CXF's OAuth2 code lets an attacker use a login token issued for one application to access a different application that trusts the same login system. Because the software does not confirm who the token was meant for, sensitive APIs may accept tokens they should reject. Apache has released fixes; upgrading is strongly recommended. Applications built on Apache CXF 4.2.0 (and earlier lines up to the fixed releases) that use the OAuth2 module org.apache.cxf:cxf-rt-rs-security-oauth2 and rely on JwtAccessTokenValidator to authorize incoming access tokens. Red Hat has issued RHSA-2026:37390, indicating downstream JBoss/Fuse-style products may also inherit the flaw. Treat as urgent for teams running OAuth2-secured APIs on Apache CXF. Schedule an emergency patch cycle to 4.2.2 or 4.1.7 within standard critical-severity SLA windows. Mitigation focus: Upgrade Apache CXF to 4.2.2 or 4.1.7 across all Resource Servers.; Apply Red Hat RHSA-2026:37390 to affected Red Hat middleware distributions.; Where patching is delayed, add custom audience and issuer checks in front of JwtAccessTokenValidator per vendor guidance..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-289: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-303: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-50627 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.1 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H2.36CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N2.85.2redhat-SADPVulnerability scoring details
Base CVSS 3.1 score
9.1CriticalVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Base CVSS 3.1 score
8.1HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- ADP timelineredhat-SADP
Made public.
- CVE publishedCVE Program
The CVE record was published.
- ADP timelineredhat-SADP
Reported to Red Hat.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2026-06-12T10:00:52.910Z: Reported to Red Hat.
- 2026-06-12T08:55:41.657Z: Made public.
Source materials
- CVE List V5 sourceCVE List V5
- https://lists.apache.org/thread/0jfzz9q992957b99tw7hodcqjfyxwb1mCVE reference, apache · vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-50627CVE reference, redhat-SADP · vdb-entry, x_refsource_REDHAT
- RHBZ#2488298CVE reference, redhat-SADP · issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-50627.jsonCVE reference, redhat-SADP · x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:37390CVE reference, redhat-SADP · vendor-advisory, x_refsource_REDHAT
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Authentication Bypass by Alternate Name
Authentication Bypass by Alternate Name represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Incorrect Implementation of Authentication Algorithm
Incorrect Implementation of Authentication Algorithm represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.