# CVE-2026-0265: PAN-OS: Authentication Bypass with Cloud Authentication Service (CAS) enabled > Unauthenticated attackers can bypass authentication on PAN-OS firewalls when Cloud Authentication Service is enabled, particularly on the management interface. - **Severity:** High 7.2 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Red`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** No - **Published:** 13 May 2026 - **Updated:** 15 Oct 2026 - **Also known as:** GHSA-qcp7-r34x-6gv6 ## What is CVE-2026-0265? CVE-2026-0265 is a high-severity authentication bypass vulnerability in Paloaltonetworks Pan-Os, published on 13 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description An authentication bypass vulnerability in Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to bypass authentication controls when Cloud Authentication Service (CAS) is enabled. The risk is higher if CAS is enabled on the management interface and lower when any other login interfaces are used. The risk of this issue is greatly reduced if you secure access to the management web interface by restricting access to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma Access® are not impacted by this vulnerability. Weakness: CWE-347 (Improper Verification of Cryptographic Signature) ## Which versions are affected by CVE-2026-0265? It affects 2 products. Products: Paloaltonetworks Pan-Os, Siemens Ruggedcom Ape1808 Firmware. ## How do I fix CVE-2026-0265? No fix has been published for CVE-2026-0265 yet. Limit exposure of the affected software until one is available. ## Is CVE-2026-0265 being exploited? It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-0265 exists. Public exploit code: - Safely detect whether a PAN-OS target is vulnerable to CVE-2026-0265. (github_poc): https://github.com/BishopFox/CVE-2026-0265-check - Python script to sweep a fleet of Palo Alto firewalls and Panoramas via SSH, check PAN-OS version against CVE-2026-0265 (Authentication Bypass via Cloud Authentication Service), detect whether CAS is actually configured, and report exploitability in a color-coded summary table. (github_poc): https://github.com/tstephens1080/palo-alto-cve-2026-0265-checker - PAN-OS GlobalProtect CAS CVE-2026-0265 Vulnerability Checker (metasploit) ## 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-2026-0265 and fix it if it is affected. What it is: CVE-2026-0265 is a high-severity authentication bypass vulnerability in Paloaltonetworks Pan-Os, published on 13 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-0265 exists. Affected product: Paloaltonetworks Pan-Os. 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-2026-0265/ (Markdown: https://insights.sbomify.com/CVE-2026-0265/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2026-0265 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-0265 - OSV: https://osv.dev/vulnerability/CVE-2026-0265 --- From sbomify Insights: https://insights.sbomify.com/CVE-2026-0265/ Summaries are generated and may contain mistakes; the official description above is the record.