# CVE-2026-70855: Missing authorization in Siebel Apps - Self Service

> Unauthenticated attackers can modify or read critical Siebel CRM data via HTTP, requiring user interaction to exploit.

- **Severity:** Critical 9.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 18 Aug 2026
- **Updated:** 26 Aug 2026
- **Also known as:** GHSA-rpm3-wx24-q75c

## What is CVE-2026-70855?

CVE-2026-70855 is a critical missing authorization vulnerability in Oracle Corporation Siebel Apps - Self Service, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Vulnerability in the Siebel Apps - Self Service product of Oracle Siebel CRM (component: Helpdesk/Training).  Supported versions that are affected are 17.0-26.6. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel Apps - Self Service.  Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Siebel Apps - Self Service, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in  unauthorized creation, deletion or modification access to critical data or all Siebel Apps - Self Service accessible data as well as  unauthorized access to critical data or complete access to all Siebel Apps - Self Service accessible data. CVSS 3.1 Base Score 9.3 (Confidentiality and Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N).

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-70855?


## How do I fix CVE-2026-70855?

No fix has been published for CVE-2026-70855 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-70855 being exploited?

There is no known exploitation of CVE-2026-70855 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-70855 and fix it if it is affected.

What it is: CVE-2026-70855 is a critical missing authorization vulnerability in Oracle Corporation Siebel Apps - Self Service, published on 18 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-70855 in the wild and no public exploit code.

Affected product: Oracle Corporation Siebel Apps - Self Service. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-70855/ (Markdown: https://insights.sbomify.com/CVE-2026-70855/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-70855
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-70855
- OSV: https://osv.dev/vulnerability/CVE-2026-70855

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-70855/
Summaries are generated and may contain mistakes; the official description above is the record.