{"answers":{"affected":"It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33666 exists.","fix":"No fix has been published for CVE-2026-33666 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-33666 is a high-severity vulnerability in ndsev zserio, published on 24 Apr 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-2026-33666 and fix it if it is affected.\n\nWhat it is: CVE-2026-33666 is a high-severity vulnerability in ndsev zserio, published on 24 Apr 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-2026-33666 exists.\n\nAffected product: ndsev zserio. 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-2026-33666/ (Markdown: https://insights.sbomify.com/CVE-2026-33666/index.md)","id":"CVE-2026-33666","markdown":"https://insights.sbomify.com/CVE-2026-33666/index.md","name":"CVE-2026-33666","record":{"aliases":["GHSA-fjwv-6wcr-vqwj"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Zserio serialization library","requires_auth":"none","summary":"An integer overflow in Zserio's BitStreamReader allows attackers to cause a segmentation fault and denial of service on 32-bit platforms.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"zserio","vendor":"nds-association"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-190","name":"Integer Overflow or Wraparound"}],"description":"Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, in BitStreamReader.h readBytes() / readString(), the setBitPosition() bounds check receives the overflowed value and is completely bypassed. The code then reads len bytes (512 MB) from a buffer that is only a few bytes long, causing a segmentation fault. This vulnerability is fixed in 2.18.1.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"Zserio: Integer Overflow in BitStreamReader on 32-bit platforms","id":"CVE-2026-33666","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"OpenProject: 2FA OTP Verification Missing Rate Limiting","id":"CVE-2026-33667"},"packages":[],"prev":{"headline":"n8n: LDAP Email-Based Account Linking Allows Privilege Escalation and Account Takeover","id":"CVE-2026-33665"},"products":["zserio"],"published":"2026-04-24","related":[{"cvss_score":7.5,"headline":"Zserio: Integer Overflow in BitStreamReader and Unbounded Memory Allocation in Deserialization","id":"CVE-2026-33524","kev_date_added":null,"published":"2026-04-24"}],"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":"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":"2026-04-27","vendors":["ndsev"]},"summary":"An integer overflow in Zserio's BitStreamReader allows attackers to cause a segmentation fault and denial of service on 32-bit platforms.","url":"https://insights.sbomify.com/CVE-2026-33666/"}