{"answers":{"affected":"It affects 2 products.","exploited":"Yes. Attackers have exploited CVE-2026-0300 in the wild since at least 6 May 2026.","fix":"No fix has been published for CVE-2026-0300 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 9 May 2026.","what":"CVE-2026-0300 is a critical memory corruption vulnerability in Paloaltonetworks Pan-Os, published on 6 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-0300 and fix it if it is affected.\n\nWhat it is: CVE-2026-0300 is a critical memory corruption vulnerability in Paloaltonetworks Pan-Os, published on 6 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2026-0300 in the wild since at least 6 May 2026.\n\nAffected product: Paloaltonetworks Pan-Os. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. 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.\n2. 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.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-0300/ (Markdown: https://insights.sbomify.com/CVE-2026-0300/index.md)","id":"CVE-2026-0300","markdown":"https://insights.sbomify.com/CVE-2026-0300/index.md","name":"CVE-2026-0300","record":{"aliases":["GHSA-3vfh-3cpw-2378"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"PAN-OS firewall","requires_auth":"none","summary":"Unauthenticated attackers can execute arbitrary code with root privileges on PAN-OS firewalls via a buffer overflow in the User-ID Authentication Portal.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"palo_alto","cpe":[{"product":"pan-os","vendor":"paloaltonetworks"},{"product":"ruggedcom_ape1808_firmware","vendor":"siemens"}],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:N/E:A/AU:Y/R:U/V:C/RE:M/U:Red","version":"4.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"A buffer overflow vulnerability in the User-ID™ Authentication Portal (aka Captive Portal) service of Palo Alto Networks PAN-OS software allows an unauthenticated attacker to execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls by sending specially crafted packets. \n\nThe risk of this issue is greatly reduced if you secure access to the User-ID™ Authentication Portal per the  best practice guidelines https://knowledgebase.paloaltonetworks.com/KCSArticleDetail  by restricting access to only trusted internal IP addresses.\n\nPrisma Access, Cloud NGFW and Panorama appliances are not impacted by this vulnerability.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-05-06","github_poc":10,"max_poc_stars":22,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-05-06T23:56:52Z","kind":"github_poc","ref":"https://github.com/p3Nt3st3r-sTAr/CVE-2026-0300-POC","stars":22,"title":null},{"date":"2026-05-06T14:14:27Z","kind":"github_poc","ref":"https://github.com/matad0r-maghribi/CVE-2026-0300-PANOS","stars":4,"title":"Security Research and Proof-of-Concept (PoC) for CVE-2026-0300 : Unauthenticated Remote Code Execution (RCE) in Palo Alto Networks PAN-OS User-ID Portal."},{"date":"2026-05-06T04:33:09Z","kind":"github_poc","ref":"https://github.com/qassam-315/PAN-OS-User-ID-Buffer-Overflow-PoC","stars":3,"title":"A research-grade Proof-of-Concept (PoC) for CVE-2026-0300, targeting the Buffer Overflow vulnerability in Palo Alto Networks PAN-OS User-ID™ Authentication Portal (CWE-787)."},{"date":"2026-05-22T20:44:11Z","kind":"github_poc","ref":"https://github.com/ridhinva/panos-captive-portal-rce","stars":2,"title":"Scanner: CVE-2026-0300 PAN-OS User-ID Captive Portal Buffer Overflow RCE — Python CLI for detecting actively exploited BOF vulnerability in Palo Alto firewalls (CISA KEV 2026-05-13)"},{"date":"2026-05-06T05:45:17Z","kind":"github_poc","ref":"https://github.com/mr-r3b00t/CVE-2026-0300","stars":1,"title":"a honeypot for CVE-2026-0300"},{"date":"2026-05-06T09:57:04Z","kind":"github_poc","ref":"https://github.com/0xredash/CVE-2026-0300","stars":1,"title":"CVE-2026-0300"},{"date":"2026-05-06T21:47:12Z","kind":"github_poc","ref":"https://github.com/shizuku198411/CVE-2026-0300","stars":1,"title":"PAN-OS CVE-2026-0300 Non-Destructive Exposure Survey Tool"},{"date":"2026-05-06T10:57:29Z","kind":"github_poc","ref":"https://github.com/TailwindRG/cve-2026-0300-audit","stars":0,"title":"Read-only audit tooling for CVE-2026-0300 (PAN-OS User-ID Authentication Portal exposure)"}],"tier":"exploited"},"has_fix":null,"headline":"Palo Alto Networks PAN-OS Out-of-bounds Write","id":"CVE-2026-0300","indexable":true,"kev":{"dateAdded":"2026-05-06","dueDate":"2026-05-09","knownRansomwareCampaignUse":"Unknown","product":"PAN-OS","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Until the vendor releases an official fix, the following workaround should be implemented:  - Restrict User-ID Authentication Portal access to only trusted zones.  - Disable User-ID Authentication Portal if not required. 5/13/2026: Palo Alto has released a variety of patches. If these are relevant to your environment, please apply the designated patch.","vendorProject":"Palo Alto Networks","vulnerabilityName":"Palo Alto Networks PAN-OS Out-of-bounds Write Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"paloaltonetworks:pan-os","products":["paloaltonetworks:pan-os"],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"PAN-OS: Information Disclosure Vulnerability in URL Filtering","id":"CVE-2026-0301"},"packages":[],"prev":{"headline":"GlobalProtect App: Local Privilege Escalation Vulnerabilities","id":"CVE-2026-0299"},"products":["Cloud NGFW","PAN-OS","Prisma Access"],"published":"2026-05-06","related":[{"cvss_score":10,"headline":"Palo Alto Networks PAN-OS Command Injection","id":"CVE-2024-3400","kev_date_added":"2024-04-12","published":"2024-04-12"},{"cvss_score":10,"headline":"Palo Alto Networks PAN-OS Authentication Bypass","id":"CVE-2020-2021","kev_date_added":"2022-03-25","published":"2020-06-29"},{"cvss_score":9.8,"headline":"Palo Alto Networks PAN-OS Remote Code Execution","id":"CVE-2017-15944","kev_date_added":"2022-08-18","published":"2017-12-11"},{"cvss_score":9.3,"headline":"Palo Alto Networks PAN-OS Management Interface Authentication Bypass","id":"CVE-2024-0012","kev_date_added":"2024-11-18","published":"2024-11-18"},{"cvss_score":9.2,"headline":"PHP Memory Corruption","id":"CVE-2026-109618","kev_date_added":"2026-10-26","published":"2026-10-21"},{"cvss_score":9.2,"headline":"PHP Stale Internal Request-State","id":"CVE-2026-109619","kev_date_added":"2026-10-26","published":"2026-10-21"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"open","licence":"CC0 1.0","name":"CISA KEV"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-15","vendors":["Palo Alto Networks"]},"summary":"Unauthenticated attackers can execute arbitrary code with root privileges on PAN-OS firewalls via a buffer overflow in the User-ID Authentication Portal.","url":"https://insights.sbomify.com/CVE-2026-0300/"}