{"answers":{"affected":"4 open source packages ship an affected version, including io.netty:netty-codec-http2. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-48043 in the wild and no public exploit code.","fix":"Upgrade io.netty:netty-codec-http2 to a fixed version for your release line: 4.1.135.Final or 4.2.15.Final.","what":"CVE-2026-48043 is a medium-severity denial of service 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-2026-48043 and fix it if it is affected.\n\nWhat it is: CVE-2026-48043 is a medium-severity denial of service 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-2026-48043 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- io.netty:netty-codec-http2 (Maven): affected all versions; fixed in 4.1.135.Final\n- io.netty:netty-codec-http2 (Maven): affected all versions; fixed in 4.1.135.Final\n- io.netty:netty-codec-http2 (Maven): affected from 4.2.0.Alpha1; fixed in 4.2.15.Final\n- io.netty:netty-codec-http2 (Maven): affected from 4.2.0.Alpha1; 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-2026-48043/ (Markdown: https://insights.sbomify.com/CVE-2026-48043/index.md)","id":"CVE-2026-48043","markdown":"https://insights.sbomify.com/CVE-2026-48043/index.md","name":"CVE-2026-48043","record":{"aliases":["CLEANSTART-2026-BV89679","CLEANSTART-2026-GU85680","CLEANSTART-2026-HW37791","CLEANSTART-2026-VG66831","CLEANSTART-2026-VM89783","CLSA-2026-1786361708","CLSA-2026-1786362389","DEBIAN-CVE-2026-48043","ECHO-b4ed-b9f0-91a0","GHSA-c2gf-v879-257j","MINI-24qg-7grm-795q","MINI-2c52-84cf-2frr","MINI-2crq-5wr7-j6rc","MINI-2v86-6mwq-qj5h","MINI-2wmm-4xx2-39mh","MINI-34rp-cfrg-9w6h","MINI-3fgm-5369-9j5x","MINI-3p9p-97xq-2p86","MINI-3vpq-2pgj-hccx","MINI-4gfm-qcq7-96w4","MINI-4rcr-2mvc-h876","MINI-57m6-w5c4-9frr","MINI-5jrg-5h5v-wjv7","MINI-63hr-p84g-c7pq","MINI-68v9-vwx6-5qf3","MINI-6q8m-88qh-w48x","MINI-6wgq-8xvj-2jc5","MINI-77hh-56q6-2628","MINI-77vx-jx8w-x5f7","MINI-7f9j-hpwg-qf3w","MINI-7mcj-f87c-qmm6","MINI-8q4v-wfqw-wmqm","MINI-8q9q-gv7v-qp6c","MINI-8r5r-78x2-m2j9","MINI-9454-f86j-p2rc","MINI-97v7-7rjf-7fqh","MINI-9q2w-jh2r-8mr3","MINI-c3wh-3fqq-xj2m","MINI-c5cg-cx46-qfg3","MINI-c8cf-7gxv-hgc2","MINI-cc22-4xvq-f3vf","MINI-cg89-vh7h-v25h","MINI-cxwx-h3pr-pq4j","MINI-f4g4-74hj-gcf5","MINI-f534-cvgc-hcx9","MINI-fc66-7q3f-9g85","MINI-fvc3-29qw-4h6c","MINI-fwrf-4h7v-8fv8","MINI-fx73-m9g6-hcrf","MINI-g2qp-53rp-2w65","MINI-gc5x-66x7-xgmc","MINI-gjh8-vrm2-8vvj","MINI-gmvv-5hhx-g827","MINI-h3qh-vx4g-xx42","MINI-hm4h-vqg6-q3g5","MINI-hq2p-6hxc-wppg","MINI-j352-vwcg-2wqh","MINI-jpv5-j4vx-x2wc","MINI-jvwj-pmrm-pxhw","MINI-m3r8-f6hx-8phj","MINI-mq3c-x397-6cq5","MINI-p7r2-85pm-457m","MINI-pc5q-m32m-xhh6","MINI-pgg6-q9cm-w89f","MINI-q2c3-5cr2-g6q7","MINI-q7f4-5gg6-75rw","MINI-q874-v444-7jgq","MINI-qj9m-r37m-p257","MINI-rm7g-qxr8-r553","MINI-vgx5-v4m2-6rpm","MINI-vrrm-4w32-mpjf","MINI-w4mg-547j-2739","MINI-w898-cmvm-2f24","MINI-wv68-c4w9-cvjv","MINI-wwfh-67vp-mgrh","MINI-x822-jgpx-x88x","MINI-x8cv-283p-6g5p","MINI-x9vr-v7g7-6f7q","MINI-xc7c-gg9m-wp3g","MINI-xr72-4jxm-mg5j","MINI-xrc2-qrjc-q264","MINI-xrr2-g973-33q6","MINI-xx9f-g688-p765","MINI-xxg9-5333-p269","ROOT-APP-MAVEN-CVE-2026-48043","UBUNTU-CVE-2026-48043"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Netty HTTP/2 codec","requires_auth":"none","summary":"A remote attacker can cause memory exhaustion and JVM crash in Netty HTTP/2 servers by triggering a ByteBuf reference-count leak during decompression.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"netty","vendor":"netty"}],"cvss":{"score":5.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-772","name":"Missing Release of Resource after Effective Lifetime"},{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Netty is a network application framework for development of protocol servers and clients. In netty-codec-http2 prior to versions 4.1.135.Final and 4.2.15.Final, the `DelegatingDecompressorFrameListener` class orchestrates HTTP/2 decompression by embedding a per-stream `EmbeddedChannel` that runs the appropriate decompression codec (gzip, deflate, zstd) and forwards decompressed chunks to a wrapped listener. Each decompressed chunk is a pooled `ByteBuf` handed to an anonymous `ChannelInboundHandlerAdapter` tail handler, which becomes the sole owner responsible for releasing it. A remote peer could send frames that would result in the flow-controller throwing and so trigger a resource leak which at the end might take down the whole JVM due OOME. 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-codec-http2: ByteBuf Reference-Count Leak in DelegatingDecompressorFrameListener Leads to Memory Exhaustion","id":"CVE-2026-48043","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Maven","product":"netty:netty","products":["netty:netty"],"type":"denial_of_service","year":"2026"},"n_packages":4,"n_references":3,"next":{"headline":"Envoy Zstd Decompressor: Ratio Check at Wrong Loop Depth lead to memory explosion","id":"CVE-2026-48044"},"packages":[{"ecosystem":"Maven","fixed":["4.1.135.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-codec-http2","purl":null,"source":"GHSA-c2gf-v879-257j"},{"ecosystem":"Maven","fixed":["4.1.135.Final"],"introduced":["0"],"last_affected":[],"package":"io.netty:netty-codec-http2","purl":"pkg:maven/io.netty/netty-codec-http2","source":"GHSA-c2gf-v879-257j"},{"ecosystem":"Maven","fixed":["4.2.15.Final"],"introduced":["4.2.0.Alpha1"],"last_affected":[],"package":"io.netty:netty-codec-http2","purl":null,"source":"GHSA-c2gf-v879-257j"},{"ecosystem":"Maven","fixed":["4.2.15.Final"],"introduced":["4.2.0.Alpha1"],"last_affected":[],"package":"io.netty:netty-codec-http2","purl":"pkg:maven/io.netty/netty-codec-http2","source":"GHSA-c2gf-v879-257j"}],"prev":{"headline":"Envoy: Stack overflow in destructor of highly nested JSON","id":"CVE-2026-48042"},"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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-18","vendors":["netty"]},"summary":"A remote attacker can cause memory exhaustion and JVM crash in Netty HTTP/2 servers by triggering a ByteBuf reference-count leak during decompression.","url":"https://insights.sbomify.com/CVE-2026-48043/"}