# CVE-2026-83542: Apache OFBiz: Unauthenticated RCE via login-page widget injection

Status: published. Published: 2026-11-05. Updated: 2026-11-06.

Improper Control of Generation of Code ('Code Injection') in Apache OFBiz 24.09 before 24.09.08 on all platforms allows a remote unauthenticated attacker to execute arbitrary code on the server by staging crafted widget XML in a multipart upload and overriding the mainDecoratorLocation used by a manager login route through an anonymous JSON request, causing OFBiz to load the staged XML through its live screen descriptor mechanism and evaluate an unsandboxed Groovy expression while rendering the authentication-failure page. Further validation established the following:

-- The exploit does not require a malformed or incomplete multipart body: a well-formed multipart request that is kept in flight and then allowed to complete normally is sufficient.

-- The screen loader reads the widget XML from a live process file descriptor while the upload is streaming, rather than from any file the attacker persists to disk.

-- The same underlying issue is also reachable through the public, explicitly unauthenticated /sfa/control/editPortalPageColumnWidth route, returning command output directly in an HTTP 200 response — it is not limited to the login-failure rendering path used in the original report.

Users are recommended to upgrade to version 24.09.08, which fixes this issue.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Apache Software Foundation / Apache OFBiz: ≥ 0; < 24.09.08 (affected, semver). Source: CNA: apache

## Severity and prioritization

- CVSS 3.1: 9.8 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source: ADP: CISA-ADP

- CVSS 3.1: 9.8 (critical); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H; source: NVD: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable yes; technical impact total; source ADP: CISA-ADP

- Weaknesses: CWE-94

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://lists.apache.org/thread.html/7b2syzksp7klt9fvhdg0olldvs2g83lz (CNA: apache; vendor-advisory)

- https://lists.apache.org/thread.html/7b2syzksp7klt9fvhdg0olldvs2g83lz (security@apache.org)

## Provenance

- CNA: apache: https://www.cve.org/CVERecord?id=CVE-2026-83542; retrieved 2026-11-06; source updated 2026-11-06

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-83542; retrieved 2026-11-06; source updated 2026-11-06

Revision: 0da478668aaa6810a4bc65f5b86b4f661ba45986487e4de1e5c13d87879867a7

Canonical: https://y2.dev/cve/CVE-2026-83542

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