{"answers":{"affected":"4 open source packages ship an affected version, including github.com/iskorotkov/avro/v2 and github.com/hamba/avro/v2.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-46385 exists.","fix":"Upgrade github.com/iskorotkov/avro/v2 to 2.33.0 or later.","what":"CVE-2026-46385 is a high-severity denial of service vulnerability in iskorotkov avro, published on 29 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-2026-46385 and fix it if it is affected.\n\nWhat it is: CVE-2026-46385 is a high-severity denial of service vulnerability in iskorotkov avro, published on 29 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-46385 exists.\n\nAffected packages and fixed versions:\n- github.com/iskorotkov/avro/v2 (Go): affected all versions; fixed in 2.33.0\n- github.com/iskorotkov/avro/v2 (Go): affected all versions; fixed in 2.33.0\n- github.com/iskorotkov/avro/v2 (Go): affected all versions; fixed in 2.33.0\n- github.com/hamba/avro/v2 (Go): affected all versions; no fix listed\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-2026-46385/ (Markdown: https://insights.sbomify.com/CVE-2026-46385/index.md)","id":"CVE-2026-46385","markdown":"https://insights.sbomify.com/CVE-2026-46385/index.md","name":"CVE-2026-46385","record":{"aliases":["CLEANSTART-2026-FR69165","CLEANSTART-2026-JT88657","GHSA-w8j3-pq8g-8m7w","GO-2026-5046","MINI-259m-chq7-227q","MINI-2jgm-x8q5-pg42","MINI-36hr-c7m5-wxfc","MINI-3pgc-p7xc-ffp4","MINI-4fjm-6gxc-gqwg","MINI-69q8-v489-24vv","MINI-6fm5-fgr7-922q","MINI-73jf-fwjf-w3f4","MINI-752g-crmm-9fh8","MINI-8xgj-8w33-h66j","MINI-f623-hghh-h49h","MINI-j6jr-5cx2-qrxx","MINI-mrvx-4x4g-h9f7","MINI-q373-jcwv-fp4h","MINI-rhmw-324p-xhgm","ROOT-APP-GOBINARY-CVE-2026-46385"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Go Avro codec","requires_auth":"none","summary":"A remote attacker can cause CPU exhaustion and denial of service by sending a crafted Avro payload with a large block count to applications using the vulnerable Go library.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-835","name":"Loop with Unreachable Exit Condition"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"iskorotkov/avro is a fast Go Avro codec. Prior to 2.33.0, the Avro array and map decoders looped over an attacker-controlled block-count value without checking the underlying reader's error state inside the loop body. Reader.ReadBlockHeader returns the count as a Go int, which is 64-bit on amd64 / arm64 targets — so a producer can declare a block of up to math.MaxInt64 (~9.2 × 10¹⁸) elements followed by EOF (or any truncated payload), and the decoder will attempt that many no-op iterations before propagating the error. The realistic ceiling is \"indefinite until the worker is killed externally\" — a single hostile payload pins a CPU core until the process is OOM-killed, deadline-cancelled, or terminated. Remote, unauthenticated denial-of-service. This vulnerability is fixed in 2.33.0.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"iskorotkov/avro: CPU Exhaustion in Avro Decoder","id":"CVE-2026-46385","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":4,"n_references":1,"next":{"headline":"Deserialization in openproject","id":"CVE-2026-46386"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/hamba/avro/v2","purl":"pkg:golang/github.com/hamba/avro/v2","source":"GO-2026-5046"},{"ecosystem":"Go","fixed":["2.33.0"],"introduced":["0"],"last_affected":[],"package":"github.com/iskorotkov/avro/v2","purl":null,"source":"GHSA-w8j3-pq8g-8m7w"},{"ecosystem":"Go","fixed":["2.33.0"],"introduced":["0"],"last_affected":[],"package":"github.com/iskorotkov/avro/v2","purl":"pkg:golang/github.com/iskorotkov/avro/v2","source":"GHSA-w8j3-pq8g-8m7w"},{"ecosystem":"Go","fixed":["2.33.0"],"introduced":["0"],"last_affected":[],"package":"github.com/iskorotkov/avro/v2","purl":"pkg:golang/github.com/iskorotkov/avro/v2","source":"GO-2026-5046"}],"prev":{"headline":"iskorotkov/avro: Integer Overflow in Avro Decoder","id":"CVE-2026-46384"},"products":["avro"],"published":"2026-05-29","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-09","vendors":["iskorotkov"]},"summary":"A remote attacker can cause CPU exhaustion and denial of service by sending a crafted Avro payload with a large block count to applications using the vulnerable Go library.","url":"https://insights.sbomify.com/CVE-2026-46385/"}