Security Digest · Vulnerability record
CVE-2026-50628: Apache CXF OAuth2 has Inverted IP Binding Check that Defeats Security Control
A logic error in OAuthRequestFilter rejects legitimate requests originating from the bound IP address, while blindly allowing requests from any other IP address.
CVSS 7.4 High EPSS 1.0% · p63
Should you act?
Normal patch cycle
No exploitation signal; fix it in your next routine update if you are affected. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 1.0%, percentile 63: FIRST’s model estimates a 1.0% chance of exploitation activity in the next 30 days, higher than 63% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes
org.apache.cxf:cxf-rt-rs-security-oauth2(Maven) >= 4.2.0, < 4.2.2, fixed in 4.2.2;org.apache.cxf:cxf-rt-rs-security-oauth2(Maven) < 4.1.7, fixed in 4.1.7. Check your lockfile, including transitive dependencies.
What it is
A logic error in OAuthRequestFilter rejects legitimate requests originating from the bound IP address, while blindly allowing requests from any other IP address. Enabling this security feature inadvertently creates an inverse security check. Users are recommended to upgrade to versions 4.2.2 or 4.1.7 or 3.6.12, which fixes this issue.
From the GitHub advisory
A logic error in OAuthRequestFilter rejects legitimate requests originating from the bound IP address, while blindly allowing requests from any other IP address. Enabling this
security feature inadvertently creates an inverse security check. Users are recommended to upgrade to versions 4.2.2 or 4.1.7, which fixes this issue.
Weakness type: CWE-20, CWE-358.
Product: org.apache.cxf:cxf-rt-rs-security-oauth2 (Maven) · Assigned by: apache · Published: 2026-06-12
Affected and fixed versions
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| Maven | org.apache.cxf:cxf-rt-rs-security-oauth2 | >= 4.2.0, < 4.2.2 | 4.2.2 |
| Maven | org.apache.cxf:cxf-rt-rs-security-oauth2 | < 4.1.7 | 4.1.7 |
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| Apache Software Foundation | Apache CXF | 4.2.0 < 4.2.2, 4.0.0 < 4.1.7, < 3.6.12 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| redhat-SADP | 3.1 | 7.4 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- Attack vector: network (remotely reachable)
- Attack complexity: high (needs special conditions)
- Privileges required: none (no login)
- User interaction: none
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none, automatable yes, technical impact total.
- FIRST EPSS (model of 2026-10-21): 1.02% probability of exploitation activity in the next 30 days; percentile 63.
Timeline
- — CVE record published by apache
- — GitHub-reviewed advisory GHSA-g5v7-jchf-7jrr published (critical)
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vendor and project advisories, patches
- lists.apache.org lists.apache.org
- access.redhat.com access.redhat.com
Vulnerability records
- GitHub Advisory GHSA-g5v7-jchf-7jrr github.com
- CVE.org record CVE-2026-50628 cve.org
- NVD entry CVE-2026-50628 nvd.nist.gov
Other references from the CVE record and advisory
- openwall.com openwall.com
- access.redhat.com access.redhat.com
- RHBZ#2488302 bugzilla.redhat.com
- security.access.redhat.com security.access.redhat.com