{"answers":{"affected":"2 open source packages ship an affected version, including golang and stdlib. It affects 1 product.","exploited":"There is no known exploitation of CVE-2023-39326 in the wild and no public exploit code.","fix":"Upgrade golang to a fixed version for your release line: 1.20.12 or 1.21.5.","what":"CVE-2023-39326 is a medium-severity denial of service vulnerability in Golang Go, published on 6 Dec 2023. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-39326 and fix it if it is affected.\n\nWhat it is: CVE-2023-39326 is a medium-severity denial of service vulnerability in Golang Go, published on 6 Dec 2023. 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-2023-39326 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- golang (Bitnami): affected all versions; fixed in 1.20.12, 1.21.5\n- stdlib (Go): affected all versions; fixed in 1.20.12, 1.21.5\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-2023-39326/ (Markdown: https://insights.sbomify.com/CVE-2023-39326/index.md)","id":"CVE-2023-39326","markdown":"https://insights.sbomify.com/CVE-2023-39326/index.md","name":"CVE-2023-39326","record":{"aliases":["ALSA-2024:1149","AZL-32102","AZL-32124","AZL-37446","AZL-37452","AZL-79114","AZL-98727","BELL-CVE-2023-39326","BIT-golang-2023-39326","DEBIAN-CVE-2023-39326","GHSA-9f76-wg39-x86h","GO-2023-2382","MINI-h49q-gr4h-6v4f","RHSA-2024:1149","RHSA-2024:1244","UBUNTU-CVE-2023-39326"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Go standard library","requires_auth":"none","summary":"A malicious HTTP sender can cause excessive network reads via chunk extensions, leading to denial of service in Go applications.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Go","cpe":[{"product":"go","vendor":"golang"}],"cvss":{"score":5.3,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[],"description":"A malicious HTTP sender can use chunk extensions to cause a receiver reading from a request or response body to read many more bytes from the network than are in the body. A malicious HTTP client can further exploit this to cause a server to automatically read a large amount of data (up to about 1GiB) when a handler fails to read the entire body of a request. Chunk extensions are a little-used HTTP feature which permit including additional metadata in a request or response body sent using the chunked encoding. The net/http chunked encoding reader discards this metadata. A sender can exploit this by inserting a large metadata segment with each byte transferred. The chunk reader now produces an error if the ratio of real body to encoded bytes grows too small.","ecosystems":["AlmaLinux:9","Bitnami","Go","Red Hat:enterprise_linux:7::client","Red Hat:enterprise_linux:7::server","Red Hat:enterprise_linux:7::workstation","Red Hat:enterprise_linux:9::appstream"],"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":"Denial of service via chunk extensions in net/http","id":"CVE-2023-39326","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"golang:go","products":["golang:go"],"type":"denial_of_service","year":"2023"},"n_packages":11,"n_references":5,"next":{"headline":"Openjpeg: malicious files can cause the program to enter a large loop","id":"CVE-2023-39327"},"packages":[{"ecosystem":"Bitnami","fixed":["1.20.12","1.21.5"],"introduced":["0","1.21.0-0"],"last_affected":[],"package":"golang","purl":"pkg:bitnami/golang","source":"BIT-golang-2023-39326"},{"ecosystem":"Go","fixed":["1.20.12","1.21.5"],"introduced":["0","1.21.0-0"],"last_affected":[],"package":"stdlib","purl":"pkg:golang/stdlib","source":"GO-2023-2382"},{"ecosystem":"AlmaLinux:9","fixed":["2:1.13.3-4.el9_3"],"introduced":["0"],"last_affected":[],"package":"skopeo","purl":"pkg:rpm/almalinux/skopeo","source":"ALSA-2024:1149"},{"ecosystem":"AlmaLinux:9","fixed":["2:1.13.3-4.el9_3"],"introduced":["0"],"last_affected":[],"package":"skopeo-tests","purl":"pkg:rpm/almalinux/skopeo-tests","source":"ALSA-2024:1149"},{"ecosystem":"Red Hat:enterprise_linux:7::client","fixed":["0:0.6-1.el7_9"],"introduced":["0"],"last_affected":[],"package":"rhc-worker-script","purl":"pkg:rpm/redhat/rhc-worker-script","source":"RHSA-2024:1244"},{"ecosystem":"Red Hat:enterprise_linux:7::server","fixed":["0:0.6-1.el7_9"],"introduced":["0"],"last_affected":[],"package":"rhc-worker-script","purl":"pkg:rpm/redhat/rhc-worker-script","source":"RHSA-2024:1244"},{"ecosystem":"Red Hat:enterprise_linux:7::workstation","fixed":["0:0.6-1.el7_9"],"introduced":["0"],"last_affected":[],"package":"rhc-worker-script","purl":"pkg:rpm/redhat/rhc-worker-script","source":"RHSA-2024:1244"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["2:1.13.3-4.el9_3"],"introduced":["0"],"last_affected":[],"package":"skopeo","purl":"pkg:rpm/redhat/skopeo","source":"RHSA-2024:1149"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["2:1.13.3-4.el9_3"],"introduced":["0"],"last_affected":[],"package":"skopeo-debuginfo","purl":"pkg:rpm/redhat/skopeo-debuginfo","source":"RHSA-2024:1149"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["2:1.13.3-4.el9_3"],"introduced":["0"],"last_affected":[],"package":"skopeo-debugsource","purl":"pkg:rpm/redhat/skopeo-debugsource","source":"RHSA-2024:1149"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["2:1.13.3-4.el9_3"],"introduced":["0"],"last_affected":[],"package":"skopeo-tests","purl":"pkg:rpm/redhat/skopeo-tests","source":"RHSA-2024:1149"}],"prev":{"headline":"HTTP/2 rapid reset can cause excessive work in net/http","id":"CVE-2023-39325"},"products":["net/http/internal"],"published":"2023-12-06","related":[{"cvss_score":8.1,"headline":"Microsoft Windows CryptoAPI Spoofing","id":"CVE-2020-0601","kev_date_added":"2021-11-03","published":"2020-01-14"},{"cvss_score":9.8,"headline":"Missing bound checks can lead to memory corruption in safe Go in cmd/compile","id":"CVE-2026-27143","kev_date_added":null,"published":"2026-04-08"},{"cvss_score":9.8,"headline":"Unexpected behavior from Is methods for IPv4-mapped IPv6 addresses in net/netip","id":"CVE-2024-24790","kev_date_added":null,"published":"2024-06-05"},{"cvss_score":9.8,"headline":"Arbitrary code execution via go.mod toolchain directive in cmd/go","id":"CVE-2023-39320","kev_date_added":null,"published":"2023-09-08"},{"cvss_score":9.8,"headline":"Improper handling of JavaScript whitespace in html/template","id":"CVE-2023-24540","kev_date_added":null,"published":"2023-05-11"},{"cvss_score":9.8,"headline":"Backticks not treated as string delimiters in html/template","id":"CVE-2023-24538","kev_date_added":null,"published":"2023-04-06"},{"cvss_score":9.8,"headline":"Other in go/golang","id":"CVE-2012-2666","kev_date_added":null,"published":"2021-07-09"}],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2025-02-13","vendors":["Go standard library"]},"summary":"A malicious HTTP sender can cause excessive network reads via chunk extensions, leading to denial of service in Go applications.","url":"https://insights.sbomify.com/CVE-2023-39326/"}