{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-101337 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-101337 is a high-severity memory corruption vulnerability in NLnet Labs NSD, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-101337 and fix it if it is affected.\n\nWhat it is: CVE-2026-101337 is a high-severity memory corruption vulnerability in NLnet Labs NSD, published on 14 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-101337 in the wild and no public exploit code.\n\nAffected product: NLnet Labs NSD. 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-2026-101337/ (Markdown: https://insights.sbomify.com/CVE-2026-101337/index.md)","id":"CVE-2026-101337","markdown":"https://insights.sbomify.com/CVE-2026-101337/index.md","name":"CVE-2026-101337","record":{"aliases":["ALPINE-CVE-2026-101337","DEBIAN-CVE-2026-101337","GHSA-w2rq-89vw-p64m","UBUNTU-CVE-2026-101337"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"NSD DNS server","requires_auth":"low_privilege","summary":"Attackers can overwrite the stack via specially formatted base64 RDATA fields in zone files, potentially leading to code execution.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"NLnet Labs","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"description":"When base64 data is split up in pieces, of 3 character or less, tokens were incorrectly calculated to produce 0 bytes. This enables attackers to overwrite the stack with up to 64K of attacker controlled data.  Zone files which are written out by NSD itself, such as for zones for which the NSD instance is secondary, will not be formatted like this. The zone file must be fed to NSD directly, (but it could come, for example, from an operator controlled provisioning system).","ecosystems":[],"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":"Stack overwrite from specially formatted base64 RDATA field","id":"CVE-2026-101337","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Stack overwrite from a specially crafted and formatted SVCB or HTTPS RR","id":"CVE-2026-101338"},"packages":[],"prev":{"headline":"Code injection in Forminator Forms – Contact Form, Payment Form \u0026 Custom Form Builder","id":"CVE-2026-101335"},"products":["NSD"],"published":"2026-10-14","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-14","vendors":["NLnet Labs"]},"summary":"Attackers can overwrite the stack via specially formatted base64 RDATA fields in zone files, potentially leading to code execution.","url":"https://insights.sbomify.com/CVE-2026-101337/"}