# CVE-2026-91559: Vulnerability in the PeopleSoft Enterprise FIN Manufacturing Brazil product of Oracle PeopleSoft (component: Integration).


- **Severity:** Medium 4.4 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 20 Oct 2026
- **Updated:** 26 Oct 2026
- **Also known as:** GHSA-q598-9qpq-mh2p

## What is CVE-2026-91559?

CVE-2026-91559 is a medium-severity vulnerability in Oracle Corporation PeopleSoft Enterprise FIN Manufacturing Brazil, published on 20 Oct 2026. 

### Official description

Vulnerability in the PeopleSoft Enterprise FIN Manufacturing Brazil product of Oracle PeopleSoft (component: Integration).   The supported version that is affected is 9.1. Easily exploitable vulnerability allows low privileged attacker with logon to the infrastructure where PeopleSoft Enterprise FIN Manufacturing Brazil executes to compromise PeopleSoft Enterprise FIN Manufacturing Brazil.  Successful attacks of this vulnerability can result in  unauthorized update, insert or delete access to some of PeopleSoft Enterprise FIN Manufacturing Brazil accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of PeopleSoft Enterprise FIN Manufacturing Brazil. CVSS 3.1 Base Score 4.4 (Integrity and Availability impacts).  CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L).

Weakness: CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-91559?


## How do I fix CVE-2026-91559?

No fix has been published for CVE-2026-91559 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-91559 being exploited?

There is no known exploitation of CVE-2026-91559 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-91559 and fix it if it is affected.

What it is: CVE-2026-91559 is a medium-severity vulnerability in Oracle Corporation PeopleSoft Enterprise FIN Manufacturing Brazil, published on 20 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-91559 in the wild and no public exploit code.

Affected product: Oracle Corporation PeopleSoft Enterprise FIN Manufacturing Brazil. 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-2026-91559/ (Markdown: https://insights.sbomify.com/CVE-2026-91559/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-91559
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-91559
- OSV: https://osv.dev/vulnerability/CVE-2026-91559

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-91559/
Summaries are generated and may contain mistakes; the official description above is the record.