{"answers":{"affected":"1 open source package ship an affected version, including ash_paper_trail.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77831 exists.","fix":"Upgrade ash_paper_trail to 0.7.0 or later.","what":"CVE-2026-77831 is a low-severity denial of service vulnerability in ash-project ash_paper_trail, published on 30 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-77831 and fix it if it is affected.\n\nWhat it is: CVE-2026-77831 is a low-severity denial of service vulnerability in ash-project ash_paper_trail, published on 30 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77831 exists.\n\nAffected packages and fixed versions:\n- ash_paper_trail (Hex): affected from 0.1.1; fixed in 0.7.0\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-2026-77831/ (Markdown: https://insights.sbomify.com/CVE-2026-77831/index.md)","id":"CVE-2026-77831","markdown":"https://insights.sbomify.com/CVE-2026-77831/index.md","name":"CVE-2026-77831","record":{"aliases":["EEF-CVE-2026-77831","GHSA-7c66-59m8-723c"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Elixir paper trail library","requires_auth":"none","summary":"An attacker can cause denial of service via excessive CPU and memory usage by submitting large array attributes to AshPaperTrail full-diff tracking.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"EEF","cpe":[],"cvss":{"score":2.1,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-407","name":"Inefficient Algorithmic Complexity"}],"description":"Inefficient Algorithmic Complexity vulnerability in ash-project ash_paper_trail allows a user who can submit a large array attribute to a paper-trailed create or update action to cause a denial of service through excessive CPU and memory use.\n\nWith full-diff change tracking, AshPaperTrail.ChangeBuilders.FullDiff.ListChange pairs each prior array element against the new list by rebuilding the remaining-elements accumulator with acc ++ [tuple] on every step, copying the growing list each time, so the pairing scales cubically in the array length. Nothing bounds the length and the value comes straight from action input, so one request carrying a large accepted {:array, _} attribute forces tens of seconds of CPU and multi-gigabyte allocations.\n\nThis issue affects ash_paper_trail: from 0.1.1 before 0.7.0.","ecosystems":["Hex"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Algorithmic-complexity denial of service in AshPaperTrail full-diff list tracking","id":"CVE-2026-77831","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Hex","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":1,"n_references":4,"next":{"headline":"Cross-site scripting in SOY Calendar","id":"CVE-2026-77838"},"packages":[{"ecosystem":"Hex","fixed":["0.7.0"],"introduced":["0.1.1"],"last_affected":[],"package":"ash_paper_trail","purl":"pkg:hex/ash_paper_trail","source":"EEF-CVE-2026-77831"}],"prev":{"headline":"Cross-site scripting in Spam protection, Honeypot, Anti-Spam by CleanTalk","id":"CVE-2026-77830"},"products":["ash_paper_trail"],"published":"2026-08-30","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Erlang Ecosystem Foundation","prefix":"EEF"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-31","vendors":["ash-project"]},"summary":"An attacker can cause denial of service via excessive CPU and memory usage by submitting large array attributes to AshPaperTrail full-diff tracking.","url":"https://insights.sbomify.com/CVE-2026-77831/"}