{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-29078 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-29078 is a high-severity vulnerability in lexbor, published on 13 Mar 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-2026-29078 and fix it if it is affected.\n\nWhat it is: CVE-2026-29078 is a high-severity vulnerability in lexbor, published on 13 Mar 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-2026-29078 in the wild and no public exploit code.\n\nAffected product: lexbor. 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-2026-29078/ (Markdown: https://insights.sbomify.com/CVE-2026-29078/index.md)","id":"CVE-2026-29078","markdown":"https://insights.sbomify.com/CVE-2026-29078/index.md","name":"CVE-2026-29078","record":{"aliases":["DEBIAN-CVE-2026-29078","GHSA-mrwr-xh7f-96v3","UBUNTU-CVE-2026-29078"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Lexbor browser engine","requires_auth":"none","summary":"An integer underflow in the Lexbor ISO-2022-JP encoder allows out-of-bounds memory access, potentially leading to code execution or crashes.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"lexbor","vendor":"lexbor"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-191","name":"Integer Underflow (Wrap or Wraparound)"}],"description":"Lexbor is a web browser engine library. Prior to 2.7.0, the ISO‑2022‑JP encoder in Lexbor fails to reset the temporary size variable between iterations. The statement ctx-\u003ebuffer_used -= size with a stale size = 3 causes an integer underflow that wraps to SIZE_MAX. Afterwards, memcpy is called with a negative length, leading to an out‑of‑bounds read from the stack and an out‑of‑bounds write to the heap. The source data is partially controllable via the contents of the DOM tree. This vulnerability is fixed in 2.7.0.","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":"Integer Underflow in Lexbor ISO‑2022‑JP Encoder","id":"CVE-2026-29078","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":"Type Confusion in Lexbor Fragment Parser","id":"CVE-2026-29079"},"packages":[],"prev":{"headline":"Frappe: Broken Access Control in DocShare","id":"CVE-2026-29077"},"products":["lexbor"],"published":"2026-03-13","related":[{"cvss_score":8.2,"headline":"Type Confusion in Lexbor Fragment Parser","id":"CVE-2026-29079","kev_date_added":null,"published":"2026-03-13"}],"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":"2026-03-16","vendors":["lexbor"]},"summary":"An integer underflow in the Lexbor ISO-2022-JP encoder allows out-of-bounds memory access, potentially leading to code execution or crashes.","url":"https://insights.sbomify.com/CVE-2026-29078/"}