{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-74766 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-74766 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-74766 is a high-severity use after free vulnerability, published on 22 Sep 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-2026-74766 and fix it if it is affected.\n\nWhat it is: CVE-2026-74766 is a high-severity use after free vulnerability, published on 22 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-74766 in the wild and no public exploit code.\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-2026-74766/ (Markdown: https://insights.sbomify.com/CVE-2026-74766/index.md)","id":"CVE-2026-74766","markdown":"https://insights.sbomify.com/CVE-2026-74766/index.md","name":"CVE-2026-74766","record":{"aliases":["DEBIAN-CVE-2026-74766","GHSA-qffm-j59f-77qw","UBUNTU-CVE-2026-74766"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Perl IDN library","requires_auth":"none","summary":"A heap use-after-free in the Perl Net::IDN::Punycode library allows attackers to execute code or cause denial of service via crafted punycode labels.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"CPANSec","cpe":[],"cvss":{"score":8.4,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"Net::IDN::Punycode versions from 2.301 before 2.590 for Perl allow a heap use-after-free via a decoded code point that reallocates the output buffer in decode_punycode.\n\nThe XS backend inserts each decoded code point into the string buffer of the scalar it returns. decode_punycode computes the insertion pointer first and only then grows the buffer when the code point does not fit. The growth reallocates the buffer and updates every pointer except the insertion pointer, so the move that follows and the write of the code point go through a freed pointer. The buffer starts at twice the label length, and a code point above U+FFFF takes four bytes in the output, so a label of such code points outgrows it and forces the reallocation.\n\nVersion 2.301, the fix for CVE-2016-15059, introduced the defect. Only the XS backend is affected.\n\nDecoding an attacker-supplied punycode label reads and writes freed heap memory.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Net::IDN::Punycode versions from 2.301 before 2.590 for Perl allow a heap use-after-free via a decoded code point that reallocates the outpu","id":"CVE-2026-74766","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"Unbounded DAA Decompression in Pandora Allows Denial of Service via Decompression Bomb","id":"CVE-2026-74767"},"packages":[],"prev":{"headline":"Net::IDN::Punycode versions before 2.590 for Perl allow an out-of-bounds read via integer overflow of the delta accumulator in encode_punycode.","id":"CVE-2026-74765"},"products":[],"published":"2026-09-22","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":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-22","vendors":[]},"summary":"A heap use-after-free in the Perl Net::IDN::Punycode library allows attackers to execute code or cause denial of service via crafted punycode labels.","url":"https://insights.sbomify.com/CVE-2026-74766/"}