{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-5244 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-5244 is a medium-severity vulnerability in Cesanta Mongoose, published on 2 Apr 2026."},"fix_prompt":"Check this codebase for CVE-2026-5244 and fix it if it is affected.\n\nWhat it is: CVE-2026-5244 is a medium-severity vulnerability in Cesanta Mongoose, published on 2 Apr 2026. \nExploitation: There is no known exploitation of CVE-2026-5244 in the wild and no public exploit code.\n\nAffected product: Cesanta Mongoose. 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-2026-5244/ (Markdown: https://insights.sbomify.com/CVE-2026-5244/index.md)","id":"CVE-2026-5244","markdown":"https://insights.sbomify.com/CVE-2026-5244/index.md","name":"CVE-2026-5244","record":{"aliases":["DEBIAN-CVE-2026-5244","GHSA-7vfw-f3r2-9m2j","JLSEC-2026-369","UBUNTU-CVE-2026-5244"],"analysis":null,"analysis_generated_by":null,"assigner":"VulDB","cpe":[{"product":"mongoose","vendor":"cesanta"}],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-122","name":"Heap-based Buffer Overflow"},{"id":"CWE-119","name":"Improper Restriction of Operations within the Bounds of a Memory Buffer"}],"description":"A vulnerability has been found in Cesanta Mongoose up to 7.20. This affects the function mg_tls_recv_cert of the file mongoose.c of the component TLS 1.3 Handler. Such manipulation of the argument pubkey leads to heap-based buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 7.21 mitigates this issue. The name of the patch is 0d882f1b43ff2308b7486a56a9d60cd6dba8a3f1. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.","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":"Cesanta Mongoose TLS 1.3 mongoose.c mg_tls_recv_cert heap-based overflow","id":"CVE-2026-5244","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"cesanta:mongoose","products":["cesanta:mongoose"],"type":null,"year":"2026"},"n_packages":0,"n_references":6,"next":{"headline":"Cesanta Mongoose mDNS Record mongoose.c handle_mdns_record stack-based overflow","id":"CVE-2026-5245"},"packages":[],"prev":{"headline":"Cross-site scripting in The Plus Addons for Elementor – Addons for Elementor, Page Templates, Widgets, Mega Menu, WooCommerce","id":"CVE-2026-5243"},"products":["Mongoose"],"published":"2026-04-02","related":[{"cvss_score":9.8,"headline":"Arbitrary File Write","id":"CVE-2022-25299","kev_date_added":null,"published":"2022-02-18"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2020-25756","kev_date_added":null,"published":"2020-09-18"},{"cvss_score":9.8,"headline":"Integer overflow in n/a","id":"CVE-2019-19307","kev_date_added":null,"published":"2019-11-26"},{"cvss_score":9.8,"headline":"Memory corruption in n/a","id":"CVE-2019-12951","kev_date_added":null,"published":"2019-06-24"},{"cvss_score":9.8,"headline":"Use after free in n/a","id":"CVE-2018-20353","kev_date_added":null,"published":"2019-06-10"},{"cvss_score":9.8,"headline":"Use after free in n/a","id":"CVE-2018-20354","kev_date_added":null,"published":"2019-06-10"},{"cvss_score":9.8,"headline":"Use after free in n/a","id":"CVE-2018-20355","kev_date_added":null,"published":"2019-06-10"}],"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":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-02","vendors":["Cesanta"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-5244/"}