# CVE-2026-14262: Privilege escalation in Simple JWT Login – Allows you to use JWT on REST endpoints.

> Authenticated subscribers can escalate privileges to Administrator by injecting identity claims into the JWT payload parameter.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 Jul 2026
- **Updated:** 13 Jul 2026
- **Also known as:** GHSA-4f4m-2qm7-575f

## What is CVE-2026-14262?

CVE-2026-14262 is a high-severity vulnerability in nicu_m Simple JWT Login – Allows you to use JWT on REST endpoints., published on 11 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The Simple JWT Login – Allows you to use JWT on REST endpoints. plugin for WordPress is vulnerable to Authentication Bypass to Privilege Escalation in all versions up to, and including, 3.6.6 via the `payload` parameter. The vulnerability exists because `AuthenticateService::generatePayload()` only overwrites JWT payload keys whose names appear in the admin-configured `jwt_payload` list — leaving any attacker-supplied identity claims such as `email`, `id`, or `username` intact and signed into the JWT with the site's HS256 secret. This makes it possible for authenticated attackers, with subscriber-level access and above, to escalate their privileges to that of an Administrator by injecting a target administrator's email address into the `payload` parameter at the `/wp-json/simple-jwt-login/v1/auth` endpoint, then redeeming the resulting JWT at the `/autologin` endpoint to obtain a fully authenticated session as that administrator.

Weakness: CWE-269 (Improper Privilege Management)

## Which versions are affected by CVE-2026-14262?


## How do I fix CVE-2026-14262?

No fix has been published for CVE-2026-14262 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-14262 being exploited?

There is no known exploitation of CVE-2026-14262 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-14262 and fix it if it is affected.

What it is: CVE-2026-14262 is a high-severity vulnerability in nicu_m Simple JWT Login – Allows you to use JWT on REST endpoints., published on 11 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-14262 in the wild and no public exploit code.

Affected product: nicu_m Simple JWT Login – Allows you to use JWT on REST endpoints.. 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-2026-14262/ (Markdown: https://insights.sbomify.com/CVE-2026-14262/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-14262
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-14262
- OSV: https://osv.dev/vulnerability/CVE-2026-14262

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-14262/
Summaries are generated and may contain mistakes; the official description above is the record.