{"answers":{"affected":"It affects 2 products.","exploited":"Yes. Attackers have exploited CVE-2026-81578 in the wild since at least 31 Aug 2026.","fix":"No fix has been published for CVE-2026-81578 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 14 Sep 2026.","what":"CVE-2026-81578 is a high-severity authentication bypass vulnerability in PaperCut MF/NG, published on 28 Aug 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-2026-81578 and fix it if it is affected.\n\nWhat it is: CVE-2026-81578 is a high-severity authentication bypass vulnerability in PaperCut MF/NG, published on 28 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2026-81578 in the wild since at least 31 Aug 2026.\n\nAffected product: PaperCut MF/NG. 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-2026-81578/ (Markdown: https://insights.sbomify.com/CVE-2026-81578/index.md)","id":"CVE-2026-81578","markdown":"https://insights.sbomify.com/CVE-2026-81578/index.md","name":"CVE-2026-81578","record":{"aliases":["GHSA-44wc-j6f2-7fjr"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["data_modify","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Print management software","requires_auth":"none","summary":"Unauthenticated attackers can bypass access controls to modify system configurations in PaperCut MF/NG web interfaces.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"PaperCut","cpe":[{"product":"papercut_mf","vendor":"papercut"},{"product":"papercut_ng","vendor":"papercut"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-305","name":"Authentication Bypass by Primary Weakness"}],"description":"An improper access control vulnerability exists in the web management interface of PaperCut MF and PaperCut NG. Under specific conditions, unauthenticated remote requests targeting administrative functions can trigger backend actions prior to the  completion of access validation checks. This allows an unauthenticated remote attacker to modify certain system configurations.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-08-27","github_poc":2,"max_poc_stars":4,"metasploit":1,"nuclei":1,"refs":[{"date":"2026-08-29T13:12:33Z","kind":"github_poc","ref":"https://github.com/yora1928/PaperCut-CVE-2026-81578-82078","stars":4,"title":"Security research tool for PaperCut CVE-2026-81578 \u0026 CVE-2026-82078"},{"date":"2026-08-29T15:08:43Z","kind":"github_poc","ref":"https://github.com/virologi-info/papercut-toolkit","stars":2,"title":"#PaperCut CVE-2026-81578 + CVE-2026-82078 Defense Toolkit 2 3 A **defensive** toolkit to check and understand exposure to the chained"},{"date":"2026-08-27","kind":"metasploit","ref":"exploit/multi/http/papercut_ng_external_user_lookup_rce","stars":null,"title":"PaperCut NG/MF Unauthenticated RCE (CVE-2026-81578 + CVE-2026-82078)"},{"date":null,"kind":"nuclei","ref":"http/cves/2026/CVE-2026-81578.yaml","stars":null,"title":"PaperCut NG/MF \u003c=26.0.4 - Unauthenticated ConfigEditor Access via Tapestry Complex-Direct"}],"tier":"exploited"},"has_fix":null,"headline":"PaperCut NG/MF Missing Authentication for Critical Function","id":"CVE-2026-81578","indexable":true,"kev":{"dateAdded":"2026-08-31","dueDate":"2026-09-14","knownRansomwareCampaignUse":"Unknown","product":"NG/MF","requiredAction":"Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.","vendorProject":"PaperCut","vulnerabilityName":"PaperCut NG/MF Missing Authentication for Critical Function Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"An untrusted Pointer Dereference can be exploited to escalate privileges by an unprivileged user on Windows","id":"CVE-2026-81579"},"packages":[],"prev":{"headline":"Improper Authentication of Session Handles","id":"CVE-2026-81576"},"products":["PaperCut MF/NG"],"published":"2026-08-28","related":[{"cvss_score":9.8,"headline":"PaperCut MF/NG Improper Access Control","id":"CVE-2023-27350","kev_date_added":"2023-04-21","published":"2023-04-20"},{"cvss_score":9.4,"headline":"PaperCut NG/MF Unsafe Reflection","id":"CVE-2026-82078","kev_date_added":"2026-08-31","published":"2026-08-28"},{"cvss_score":8.4,"headline":"PaperCut NG/MF Cross-Site Request Forgery (CSRF)","id":"CVE-2023-2533","kev_date_added":"2025-07-28","published":"2023-06-20"},{"cvss_score":8.2,"headline":"PaperCut NG/MF Improper Authentication","id":"CVE-2023-27351","kev_date_added":"2026-04-20","published":"2023-04-20"},{"cvss_score":9.8,"headline":"Path traversal in n/a","id":"CVE-2023-39143","kev_date_added":null,"published":"2023-08-04"},{"cvss_score":9.8,"headline":"Code injection in n/a","id":"CVE-2019-12135","kev_date_added":null,"published":"2019-06-06"}],"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":"attribution","licence":"BSD-3-Clause","name":"Metasploit"},{"class":"attribution","licence":"MIT","name":"Nuclei templates"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"active","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-13","vendors":["PaperCut"]},"summary":"Unauthenticated attackers can bypass access controls to modify system configurations in PaperCut MF/NG web interfaces.","url":"https://insights.sbomify.com/CVE-2026-81578/"}