{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2903 exists.","fix":"Apply the vendor's patch.","what":"CVE-2026-2903 is a medium-severity vulnerability in skvadrik re2c, published on 22 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-2903 and fix it if it is affected.\n\nWhat it is: CVE-2026-2903 is a medium-severity vulnerability in skvadrik re2c, published on 22 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2903 exists.\n\nAffected product: skvadrik re2c. 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-2026-2903/ (Markdown: https://insights.sbomify.com/CVE-2026-2903/index.md)","id":"CVE-2026-2903","markdown":"https://insights.sbomify.com/CVE-2026-2903/index.md","name":"CVE-2026-2903","record":{"aliases":["AZL-78270","AZL-78273","BELL-CVE-2026-2903","DEBIAN-CVE-2026-2903","ECHO-3d92-841b-34e6","GHSA-7948-p5vf-r2m4","UBUNTU-CVE-2026-2903"],"analysis":{"component_type":"developer_tool","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"re2c lexer generator","requires_auth":"low_privilege","summary":"A local attacker can cause a denial of service in re2c via a null pointer dereference in the AST parser.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[],"cvss":{"score":4.8,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"},{"id":"CWE-404","name":"Improper Resource Shutdown or Release"}],"description":"A flaw has been found in skvadrik re2c up to 4.4. Impacted is the function check_and_merge_special_rules of the file src/parse/ast.cc. This manipulation causes null pointer dereference. The attack can only be executed locally. The exploit has been published and may be used. Patch name: febeb977936f9519a25d9fbd10ff8256358cdb97. It is suggested to install a patch to address this issue.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference","id":"CVE-2026-2903","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"UTT HiPER 810G ConfigExceptAli strcpy buffer overflow","id":"CVE-2026-2904"},"packages":[],"prev":{"headline":"WP Meteor Website Speed Optimization Addon \u003c= 3.4.16 - Unauthenticated Stored Cross-Site Scripting via Comment","id":"CVE-2026-2902"},"products":["re2c"],"published":"2026-02-22","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-23","vendors":["skvadrik"]},"summary":"A local attacker can cause a denial of service in re2c via a null pointer dereference in the AST parser.","url":"https://insights.sbomify.com/CVE-2026-2903/"}