{"answers":{"affected":"2 open source packages ship an affected version, including ch.qos.logback:logback-core.","exploited":"There is no known exploitation of CVE-2026-9828 in the wild and no public exploit code.","fix":"Upgrade ch.qos.logback:logback-core to 1.5.33 or later.","what":"CVE-2026-9828 is a low-severity unsafe deserialization vulnerability in QOS.CH Sarl logback, published on 28 May 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-2026-9828 and fix it if it is affected.\n\nWhat it is: CVE-2026-9828 is a low-severity unsafe deserialization vulnerability in QOS.CH Sarl logback, published on 28 May 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-2026-9828 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- ch.qos.logback:logback-core (Maven): affected all versions; fixed in 1.5.33\n- ch.qos.logback:logback-core (Maven): affected all versions; fixed in 1.5.33\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-2026-9828/ (Markdown: https://insights.sbomify.com/CVE-2026-9828/index.md)","id":"CVE-2026-9828","markdown":"https://insights.sbomify.com/CVE-2026-9828/index.md","name":"CVE-2026-9828","record":{"aliases":["CLEANSTART-2026-AE18231","CLEANSTART-2026-ET86830","CLEANSTART-2026-GP84897","CLEANSTART-2026-GS75454","CLEANSTART-2026-NU36119","DEBIAN-CVE-2026-9828","ECHO-7f02-286f-95bd","GHSA-p47f-322f-whfh","MINI-46mv-9pqv-4746","MINI-5ppj-v737-jc4v","MINI-5wmm-5jx4-5435","MINI-6849-8h6x-vmrx","MINI-6hm4-cj23-wx5x","MINI-8c8c-mvx2-fhmv","MINI-8m29-qmw2-qv65","MINI-8wg9-mqx6-gc3p","MINI-cgc3-f3pp-wf4x","MINI-f95m-x666-4hqj","MINI-fhhf-2c7r-99jm","MINI-fpqv-6mp9-4xm9","MINI-g78w-4xwq-w9g6","MINI-gvxh-x493-24fc","MINI-j47v-frmx-4f6r","MINI-ph9g-fc9m-fjv3","MINI-pjrr-9m6j-54ph","MINI-qr72-98wg-3c6r","MINI-r3hc-mh9v-f673","MINI-r6cv-95q4-c2q2","UBUNTU-CVE-2026-9828","openSUSE-SU-2026:11016-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Java logging library","requires_auth":"none","summary":"Attackers can bypass deserialization restrictions in Logback to instantiate restricted Java classes, though remote code execution is not currently identified.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"NCSC.ch","cpe":[],"cvss":{"score":2.9,"severity":"low","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:P/RE:L/U:Green","version":"4.0"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"Deserialization of untrusted data vulnerability in QOS.CH Sarl logback logback-core (HardenedObjectInputStream (logback-core) modules) allows Object Injection albeit heavily restricted.\n\nMore precisely, an attacker able to influence serialized data sent to \nSimpleSocketServer or SimpleSSLSocketServer can instantiate objects from\n classes in the java.lang and java.util packages that are not explicitly\n blocked.\n\nAlthough deserialization is heavily restricted by HardenedObjectInputStream and no \npractical way to achieve remote code execution or significant privilege \nescalation has been identified, this issue constitutes a bypass of the \nintended security restrictions.\n\nThis issue affects logback: through 1.5.32 inclusive.","ecosystems":["Maven","openSUSE:Tumbleweed"],"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":"Logback deserialization whitelist bypass for java.lang and java.util","id":"CVE-2026-9828","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"SQL injection in Photo Gallery by 10Web – Mobile-Friendly Image Gallery","id":"CVE-2026-9829"},"packages":[{"ecosystem":"Maven","fixed":["1.5.33"],"introduced":["0"],"last_affected":[],"package":"ch.qos.logback:logback-core","purl":null,"source":"GHSA-p47f-322f-whfh"},{"ecosystem":"Maven","fixed":["1.5.33"],"introduced":["0"],"last_affected":[],"package":"ch.qos.logback:logback-core","purl":"pkg:maven/ch.qos.logback/logback-core","source":"GHSA-p47f-322f-whfh"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["1.5.34-2.1"],"introduced":["0"],"last_affected":[],"package":"logback","purl":"pkg:rpm/opensuse/logback\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:11016-1"}],"prev":{"headline":"A arbitrary file write vulnerability exists in the boa formUploadFile functionality of X2000R (version(s): TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327).","id":"CVE-2026-9827"},"products":["logback"],"published":"2026-05-28","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"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":"partial"},"state":"PUBLISHED","updated":"2026-05-29","vendors":["QOS.CH Sarl"]},"summary":"Attackers can bypass deserialization restrictions in Logback to instantiate restricted Java classes, though remote code execution is not currently identified.","url":"https://insights.sbomify.com/CVE-2026-9828/"}