# CVE-2026-109619: PHP Stale Internal Request-State


- **Severity:** Critical 9.2 (`CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Yes, since 26 Oct 2026 (CISA KEV)
- **Fix available:** Yes
- **Published:** 21 Oct 2026
- **Updated:** 28 Oct 2026
- **Also known as:** AZL-109818, BELL-CVE-2026-109619, BIT-libphp-2026-109619, BIT-php-2026-109619, BIT-php-min-2026-109619, CLEANSTART-2026-NC34833, DEBIAN-CVE-2026-109619, ECHO-1cb9-f463-f8da, ROOT-OS-ALPINE-315-CVE-2026-109619, ROOT-OS-ALPINE-318-CVE-2026-109619, ROOT-OS-UBUNTU-2004-CVE-2026-109619, ROOT-OS-UBUNTU-2504-CVE-2026-109619, ROOT-OS-UBUNTU-2510-CVE-2026-109619, UBUNTU-CVE-2026-109619

## What is CVE-2026-109619?

CVE-2026-109619 is a critical vulnerability in Paloaltonetworks Pan-Os, published on 21 Oct 2026. 

### Official description

PHP has various global state that temporarily points into request memory. In some scenarios, global state may not be correctly reset, or may be repopulated after being reset. The global state may then refer to request memory even after it has been freed. Subsequent requests may read or branch on this stale state before it is fully initialized. Multiple strategies can trigger this condition and produce remote code execution (RCE).

Weakness: CWE-824 (Access of Uninitialized Pointer), CWE-755 (Improper Handling of Exceptional Conditions), CWE-416 (Use After Free), CWE-1419 (Incorrect Initialization of Resource), CWE-1325 (Improperly Controlled Sequential Memory Allocation)

## Which versions are affected by CVE-2026-109619?

3 open source packages ship an affected version, including libphp, php and php-min. It affects 4 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `libphp` | Bitnami | From 5.4.0 | 8.2.35, 8.3.36, 8.4.27, 8.5.12 |
| `php` | Bitnami | From 5.4.0 | 8.2.35, 8.3.36, 8.4.27, 8.5.12 |
| `php-min` | Bitnami | From 5.4.0 | 8.2.35, 8.3.36, 8.4.27, 8.5.12 |

Products: Paloaltonetworks Pan-Os, Paloaltonetworks Panorama Virtual Appliance, Php Php, Siemens Ruggedcom Ape1808 Firmware.

## How do I fix CVE-2026-109619?

Upgrade libphp to a fixed version for your release line: 8.2.35, 8.3.36, 8.4.27 or 8.5.12. US federal agencies must fix it by 29 Oct 2026.

## Is CVE-2026-109619 being exploited?

Yes. Attackers have exploited CVE-2026-109619 in the wild since at least 26 Oct 2026.

Public exploit code:

- Unauthenticated RCE toolkit for PHP 5.4–8.4.26 (CVE-2026-109619/109618) — pure-HTTP chain, JA3 impersonation, prpenetration-testingoof-of-access design (github_poc): https://github.com/aarsaputra/php2shell
- Minimal PHP session upload progress use-after-free PoC and Docker lab. (github_poc): https://github.com/unlimit0118/CVE-2026-109619-php2shell-poc
- https://github.com/cozybear-dev/cve-2026-109619 (github_poc): https://github.com/cozybear-dev/cve-2026-109619
- this is a exploit for CVE-2026-109619 (github_poc): https://github.com/LordX404/php2shell-exploit
- PHP2Shell (github_poc): https://github.com/EQSTLab/CVE-2026-109619
- CVE-2026-109619 (PHP2Shell): Pre-Auth Remote Code Execution (RCE) via PHP-FPM Stale Global State Deserialization UAF. Reproducible Docker lab, interactive shell, reverse shell & WAF/IDS rules. (github_poc): https://github.com/dev-maple/php2shell-CVE-2026-109619

## Other vulnerabilities in Paloaltonetworks Pan-Os

- [CVE-2024-3400](https://insights.sbomify.com/CVE-2024-3400/): Palo Alto Networks PAN-OS Command Injection (critical 10.0, exploited in the wild)
- [CVE-2020-2021](https://insights.sbomify.com/CVE-2020-2021/): Palo Alto Networks PAN-OS Authentication Bypass (critical 10.0, exploited in the wild)
- [CVE-2017-15944](https://insights.sbomify.com/CVE-2017-15944/): Palo Alto Networks PAN-OS Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2026-0300](https://insights.sbomify.com/CVE-2026-0300/): Palo Alto Networks PAN-OS Out-of-bounds Write (critical 9.3, exploited in the wild)
- [CVE-2024-0012](https://insights.sbomify.com/CVE-2024-0012/): Palo Alto Networks PAN-OS Management Interface Authentication Bypass (critical 9.3, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-109619 and fix it if it is affected.

What it is: CVE-2026-109619 is a critical vulnerability in Paloaltonetworks Pan-Os, published on 21 Oct 2026. 
Exploitation: Yes. Attackers have exploited CVE-2026-109619 in the wild since at least 26 Oct 2026.

Affected packages and fixed versions:
- libphp (Bitnami): affected from 5.4.0; fixed in 8.2.35, 8.3.36, 8.4.27, 8.5.12
- php (Bitnami): affected from 5.4.0; fixed in 8.2.35, 8.3.36, 8.4.27, 8.5.12
- php-min (Bitnami): affected from 5.4.0; fixed in 8.2.35, 8.3.36, 8.4.27, 8.5.12

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-2026-109619/ (Markdown: https://insights.sbomify.com/CVE-2026-109619/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-109619
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-109619
- OSV: https://osv.dev/vulnerability/CVE-2026-109619

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-109619/
Summaries are generated and may contain mistakes; the official description above is the record.