{"answers":{"affected":"2 open source packages ship an affected version, including zebrad.","exploited":"There is no known exploitation of CVE-2026-44499 in the wild and no public exploit code.","fix":"Upgrade zebrad to 4.4.0 or later.","what":"CVE-2026-44499 is a high-severity denial of service vulnerability in ZcashFoundation zebra, published on 8 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-2026-44499 and fix it if it is affected.\n\nWhat it is: CVE-2026-44499 is a high-severity denial of service vulnerability in ZcashFoundation zebra, published on 8 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-44499 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- zebrad (crates.io): affected all versions; fixed in 4.4.0\n- zebrad (crates.io): affected all versions; fixed in 4.4.0\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-2026-44499/ (Markdown: https://insights.sbomify.com/CVE-2026-44499/index.md)","id":"CVE-2026-44499","markdown":"https://insights.sbomify.com/CVE-2026-44499/index.md","name":"CVE-2026-44499","record":{"aliases":["GHSA-h9hm-m2xj-4rq9"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Zcash node","requires_auth":"none","summary":"An unauthenticated remote attacker can permanently halt block discovery on Zcash nodes by saturating the gossip queue and poisoning the syncer.","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-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"ZEBRA is a Zcash node written entirely in Rust. Prior to version 4.4.0, a composite denial-of-service vulnerability in Zebra's block discovery pipeline allows an unauthenticated remote attacker to permanently halt all new block discovery on a targeted node. The attack exploits three independent weaknesses in the gossip, syncer, and download subsystems — all exercisable from a single TCP connection — to create a monotonically growing block deficit that never self-heals. This issue has been patched in version 4.4.0.","ecosystems":["crates.io"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"ZEBRA: Permanent Block Discovery Halt via Gossip Queue Saturation and Syncer Poisoning","id":"CVE-2026-44499","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"crates.io","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":2,"n_references":1,"next":{"headline":"ZEBRA: Allocation Amplification in Inbound Network Deserializers","id":"CVE-2026-44500"},"packages":[{"ecosystem":"crates.io","fixed":["4.4.0"],"introduced":["0"],"last_affected":[],"package":"zebrad","purl":null,"source":"GHSA-h9hm-m2xj-4rq9"},{"ecosystem":"crates.io","fixed":["4.4.0"],"introduced":["0"],"last_affected":[],"package":"zebrad","purl":"pkg:cargo/zebrad","source":"GHSA-h9hm-m2xj-4rq9"}],"prev":{"headline":"ZEBRA: Block Validator Undercounts Coinbase and P2SH Sigops","id":"CVE-2026-44498"},"products":["zebra"],"published":"2026-05-08","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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-08","vendors":["ZcashFoundation"]},"summary":"An unauthenticated remote attacker can permanently halt block discovery on Zcash nodes by saturating the gossip queue and poisoning the syncer.","url":"https://insights.sbomify.com/CVE-2026-44499/"}