{"answers":{"affected":"4 open source packages ship an affected version, including io.netty:netty-resolver-dns. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-45673 in the wild and no public exploit code.","fix":"Upgrade io.netty:netty-resolver-dns to a fixed version for your release line: 4.1.135.Final or 4.2.15.Final.","what":"CVE-2026-45673 is a medium-severity vulnerability in Netty Netty, published on 12 Jun 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-2026-45673 and fix it if it is affected.\n\nWhat it is: CVE-2026-45673 is a medium-severity vulnerability in Netty Netty, published on 12 Jun 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-2026-45673 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- io.netty:netty-resolver-dns (Maven): affected all versions; fixed in 4.1.135.Final\n- io.netty:netty-resolver-dns (Maven): affected all versions; fixed in 4.1.135.Final\n- io.netty:netty-resolver-dns (Maven): affected from 4.2.0.Final; fixed in 4.2.15.Final\n- io.netty:netty-resolver-dns (Maven): affected from 4.2.0.Final; fixed in 4.2.15.Final\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-2026-45673/ (Markdown: https://insights.sbomify.com/CVE-2026-45673/index.md)","id":"CVE-2026-45673","markdown":"https://insights.sbomify.com/CVE-2026-45673/index.md","name":"CVE-2026-45673","record":{"aliases":["CLEANSTART-2026-GK86631","CLEANSTART-2026-MH05121","CLEANSTART-2026-RE47294","CLEANSTART-2026-XD15428","DEBIAN-CVE-2026-45673","ECHO-f9b6-33d0-f377","GHSA-xmv7-r254-6q78","MINI-2pm2-mrc5-qcr5","MINI-2rc2-vpcx-qc24","MINI-3cjc-42cc-34wh","MINI-3prg-w6wr-3h4f","MINI-47m2-xv6r-7c3q","MINI-49cq-vfrr-m3rr","MINI-4wx5-vfh2-87wg","MINI-56cg-3p47-3x7q","MINI-5xv6-x9qr-5r4v","MINI-65cp-993p-hj38","MINI-6cv6-5wcw-3mgw","MINI-6w6r-qg29-jh5w","MINI-6x5r-xcfg-7w4x","MINI-6x66-m7c7-w784","MINI-7hh5-9vhm-3q9m","MINI-7r8g-5j5h-6m6x","MINI-82p8-c54r-gvqv","MINI-8463-j95g-cgg2","MINI-8484-m2gq-pv9m","MINI-87m3-m693-mx89","MINI-8843-4jhm-c523","MINI-8h2w-868j-4976","MINI-8vfx-5rw6-jw5g","MINI-8wv9-6v69-p7mv","MINI-998h-6974-69gj","MINI-9j83-vhw6-vpgq","MINI-c26r-mw7j-q57q","MINI-crhg-jmwj-mmwc","MINI-f39m-cqxj-3mc8","MINI-fg83-2gm3-mwq4","MINI-fhw5-pg3j-jrv8","MINI-g2ph-9h5w-f7jv","MINI-g4c5-p968-hmvf","MINI-g4vr-4p8p-6fhm","MINI-g6pc-wj8x-j3xw","MINI-gcpj-xfx3-cmm3","MINI-h33c-wmmm-q9xg","MINI-h8ff-gf6v-fg3q","MINI-hhrc-8h27-x948","MINI-hhv2-gprv-48mg","MINI-hmc3-6c77-5vx5","MINI-hp7r-3fp3-3592","MINI-hr3j-mf72-3fh9","MINI-j7hf-g8qf-35r6","MINI-j9h3-q692-rjp8","MINI-jhmh-8rm2-6jp7","MINI-jv36-5v6j-xv7h","MINI-jxgh-6wcp-mvfj","MINI-m8h9-gxgg-2952","MINI-p2xq-wq7x-4wg5","MINI-p7gh-f239-5jmg","MINI-pgr8-489c-qwwx","MINI-r4ph-w8mm-mw35","MINI-rgq4-h7w7-c4j6","MINI-v5c2-xv87-2vpj","MINI-vw9h-w284-gq7c","MINI-w24g-v968-w8p7","MINI-w85g-fjqg-cmhq","MINI-wvgp-g668-3g5g","MINI-xh5p-c88x-wgpp","MINI-xhjg-65pf-m5jj","MINI-xq43-hchm-5xr2","RHLW-2026-7036555a81c446f8","ROOT-APP-MAVEN-CVE-2026-45673","UBUNTU-CVE-2026-45673"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Netty network framework","requires_auth":"none","summary":"Netty's predictable DNS transaction IDs and static source ports allow attackers to perform DNS cache poisoning, requiring an upgrade to patched versions.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"netty","vendor":"netty"}],"cvss":{"score":6.8,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-340","name":"Generation of Predictable Numbers or Identifiers"},{"id":"CWE-330","name":"Use of Insufficiently Random Values"}],"description":"Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, Netty's DNS resolver uses a predictable PRNG for generating DNS transaction IDs and defaults to a static UDP source port. This combination reduces the entropy of DNS queries, enabling DNS Cache Poisoning (Kaminsky attack). Versions 4.1.135.Final and 4.2.15.Final patch the issue.","ecosystems":["Maven"],"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":"Netty: DNS Cache Poisoning due to Predictable PRNG and Default Static Source Port","id":"CVE-2026-45673","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"netty:netty","products":["netty:netty"],"type":"other","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"Netty Vulnerable to DNS Cache Poisoning via Missing Bailiwick Checks in CNAME Records","id":"CVE-2026-45674"},"packages":[{"ecosystem":"Maven","fixed":["4.1.135.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-resolver-dns","purl":null,"source":"GHSA-xmv7-r254-6q78"},{"ecosystem":"Maven","fixed":["4.1.135.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-resolver-dns","purl":"pkg:maven/io.netty/netty-resolver-dns","source":"GHSA-xmv7-r254-6q78"},{"ecosystem":"Maven","fixed":["4.2.15.Final"],"introduced":["4.2.0.Final"],"last_affected":[],"package":"io.netty:netty-resolver-dns","purl":null,"source":"GHSA-xmv7-r254-6q78"},{"ecosystem":"Maven","fixed":["4.2.15.Final"],"introduced":["4.2.0.Final"],"last_affected":[],"package":"io.netty:netty-resolver-dns","purl":"pkg:maven/io.netty/netty-resolver-dns","source":"GHSA-xmv7-r254-6q78"}],"prev":{"headline":"Open WebUI: Jupyter code execution works despite `ENABLE_CODE_EXECUTION=false` — feature gate bypassed","id":"CVE-2026-45672"},"products":["netty"],"published":"2026-06-12","related":[{"cvss_score":9.1,"headline":"Netty: SNI Routing Bypass via Fragmented TLS ClientHello Causing Fallback to Default SslContext","id":"CVE-2026-75595","kev_date_added":null,"published":"2026-08-19"},{"cvss_score":8.7,"headline":"Netty: Fragmented ClientHello records trigger quadratic pre-handshake reassembly in default SNI parsing","id":"CVE-2026-75596","kev_date_added":null,"published":"2026-08-19"},{"cvss_score":8.7,"headline":"Netty Bzip2Decoder: Infinite Loop in RLE State Machine Leads to Event-Loop Thread Hang","id":"CVE-2026-59901","kev_date_added":null,"published":"2026-07-29"},{"cvss_score":8.7,"headline":"Netty codec-haproxy: Signed-Byte Sentinel Collision in HAProxyMessageDecoder Leads to Unbounded Memory Exhaustion","id":"CVE-2026-55851","kev_date_added":null,"published":"2026-07-21"},{"cvss_score":8.7,"headline":"Netty SpdyHttpDecoder: ByteBuf Reference Leak on RST_STREAM Leads to Native Memory Exhaustion","id":"CVE-2026-56745","kev_date_added":null,"published":"2026-07-21"},{"cvss_score":8.7,"headline":"Netty Vulnerable to DNS Cache Poisoning via Missing Bailiwick Checks in CNAME Records","id":"CVE-2026-45674","kev_date_added":null,"published":"2026-06-12"},{"cvss_score":8.7,"headline":"Netty has Insufficient Bailiwick Validation for NS Records","id":"CVE-2026-47691","kev_date_added":null,"published":"2026-06-12"}],"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":"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-12","vendors":["netty"]},"summary":"Netty's predictable DNS transaction IDs and static source ports allow attackers to perform DNS cache poisoning, requiring an upgrade to patched versions.","url":"https://insights.sbomify.com/CVE-2026-45673/"}