{"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-2026-33810 in the wild and no public exploit code.","fix":"Upgrade golang to 1.26.2 or later.","what":"CVE-2026-33810 is a high-severity authentication bypass vulnerability in Golang Go, published on 8 Apr 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-2026-33810 and fix it if it is affected.\n\nWhat it is: CVE-2026-33810 is a high-severity authentication bypass vulnerability in Golang Go, published on 8 Apr 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-2026-33810 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- golang (Bitnami): affected from 1.26.0-0; fixed in 1.26.2\n- stdlib (Go): affected from 1.26.0-0; fixed in 1.26.2\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-2026-33810/ (Markdown: https://insights.sbomify.com/CVE-2026-33810/index.md)","id":"CVE-2026-33810","markdown":"https://insights.sbomify.com/CVE-2026-33810/index.md","name":"CVE-2026-33810","record":{"aliases":["ALSA-2026:57126","AZL-82328","AZL-82397","BELL-CVE-2026-33810","BIT-golang-2026-33810","CLEANSTART-2026-AZ32352","CLEANSTART-2026-CL14809","CLEANSTART-2026-GP83852","CLEANSTART-2026-GW80468","CLEANSTART-2026-HB21404","CLEANSTART-2026-PF50810","CLEANSTART-2026-PN22734","CLEANSTART-2026-UX94602","CLEANSTART-2026-UY47455","DEBIAN-CVE-2026-33810","ECHO-0a42-f74b-ef37","GHSA-fv83-x2xw-2j55","GO-2026-4866","MINI-225r-8pqg-gjq7","MINI-22ww-546v-v9m2","MINI-273w-hgq8-8364","MINI-28vj-whgq-6fqg","MINI-2958-mh28-4rv4","MINI-2c73-6937-hmmm","MINI-2f85-qc27-563c","MINI-2f87-3r2p-x4rh","MINI-2fh8-mqpr-284r","MINI-2gcx-3vhr-w2cf","MINI-2jjr-5cp6-9fh2","MINI-2mp2-w89h-w959","MINI-2p3m-575h-mpwj","MINI-2p6p-wj47-8rpx","MINI-2pm5-mwf6-g755","MINI-2q2p-4jc3-2xf9","MINI-2rwg-3j39-64f8","MINI-2vrf-53wg-6x27","MINI-2w72-h8qq-mw2w","MINI-33hw-m3rj-fmmh","MINI-33qf-679r-8gc9","MINI-35pc-hvxw-h8wq","MINI-35pq-rfcm-3pgg","MINI-36pr-6mw6-qhmp","MINI-38g6-g969-xxh5","MINI-38jj-7hx2-v2ch","MINI-3953-8qh5-f6cw","MINI-3gfm-48h8-f4j5","MINI-3gj3-h89m-2vwx","MINI-3jfp-c5cq-pg3v","MINI-3jj3-7jm6-299g","MINI-3jr6-x4xf-g4vg","MINI-3mc3-6qcv-w348","MINI-3qg4-h9fx-cj97","MINI-3qh8-f7g4-5528","MINI-3qhc-p9r5-ff53","MINI-3qw6-95c9-2g8p","MINI-3v64-38gp-w4x9","MINI-3vc6-r8gj-p7jh","MINI-3vcc-rc4f-67mm","MINI-3vfw-vghh-xgcr","MINI-3vh7-68mr-9pgp","MINI-3wgr-77xm-m4rf","MINI-3wpq-3cmp-h759","MINI-3xqc-rmg2-p47g","MINI-42m7-mc7r-ffh2","MINI-443x-pppp-5f7q","MINI-44x2-4m7c-m7vv","MINI-46rf-gjwp-cffm","MINI-46x9-q38x-42q4","MINI-47vh-qqmq-32j5","MINI-48pc-jcqf-hx7g","MINI-48xv-vpgm-gwqg","MINI-49g2-w2rr-cjwq","MINI-49h3-2m6x-gfqx","MINI-4f8v-88mf-3cc5","MINI-4g69-fqpr-frmw","MINI-4g8h-rg25-qm3h","MINI-4gcc-ffm6-3q89","MINI-4ghp-8jhj-ggrp","MINI-4gmm-f5xg-r53f","MINI-4gq7-r2wg-gjvf","MINI-4grq-phj7-jg2q","MINI-4h55-m38v-wrg5","MINI-4j8p-2q9j-p5w5","MINI-4jvg-m824-xcxc","MINI-4jwc-v6cx-w54m","MINI-4mh6-pq3g-2rm2","MINI-4mwh-m97w-6mh3","MINI-4q32-j7xq-cm9v","MINI-4qcw-6f4p-3qwq","MINI-4qq3-wm76-xv46","MINI-4r63-24f7-2v82","MINI-4rhw-hvh8-cx28","MINI-4wg7-xq7j-pgg3","MINI-4wvq-2q6q-jvh3","MINI-52jf-3639-w4q4","MINI-53xf-7g6h-r7j9","MINI-54xq-jvq2-qjxx","MINI-56q7-8rhm-j5fc","MINI-57q8-2gcv-gv8r","MINI-595x-vq25-xf3x","MINI-59rp-c3h4-fww7","MINI-5fq9-2wxm-hg9w","MINI-5fqv-3xx3-hgc9","MINI-5frc-7cx8-6mwr","MINI-5gf5-23hj-hhmq","MINI-5j79-x5hv-f8jg","MINI-5q7c-hjf3-9f5h","MINI-5v6w-r55q-h7p8","MINI-5wgv-crw3-rx73","MINI-5wv4-h7gf-gf2q","MINI-5xc8-mg2r-9q4v","MINI-648p-hx54-xgj6","MINI-65p6-r774-45rp","MINI-66cq-96mq-x3g5","MINI-66m8-968w-gqcr","MINI-66wm-q8hv-wfv4","MINI-67c8-grwx-qh8f","MINI-67wf-3mg3-fjjp","MINI-68fq-4q5w-m6w2","MINI-6958-vrq4-2r7g","MINI-69c6-6388-pfrc","MINI-69h8-fw26-hxcv","MINI-6c9x-xc6p-qmxq","MINI-6cqw-pm3v-5j7p","MINI-6cr8-h95f-mw27","MINI-6f8q-9429-39vw","MINI-6f9p-8vp7-v8fr","MINI-6fcg-mc52-6pfg","MINI-6fxg-x9c3-x3fv","MINI-6h7m-r2qg-44j6","MINI-6hqf-3j8f-pm5w","MINI-6j7v-3w88-w82g","MINI-6j8h-jf87-3qqj","MINI-6jg2-rv7h-39xf","MINI-6jxj-8246-2r9j","MINI-6mcc-j5wp-gw5j","MINI-6mf2-v7vv-hj3j","MINI-6mgh-xvc3-q7j3","MINI-6v99-f5qx-44qm","MINI-6vph-fwff-qcmx","MINI-6vq8-g5j8-x87g","MINI-6wxp-46jr-ppqj","MINI-6x82-7rrq-h86x","MINI-725q-286r-xhgg","MINI-727r-5g6h-rqph","MINI-746j-p89v-gm4x","MINI-74mv-4wfg-r7j6","MINI-758q-g3w3-v9g8","MINI-785q-2mjr-9fj2","MINI-78hg-f4qx-92qp","MINI-79mq-q36g-5h6f","MINI-79rw-fcr5-mfc8","MINI-7c25-5h3h-qfgw","MINI-7ch8-qph2-xmx2","MINI-7fw2-fjp5-2pj8","MINI-7grj-6fff-rqvc","MINI-7h98-2f36-55mc","MINI-7hcw-9xh4-pwhh","MINI-7mhq-43cx-8j7f","MINI-7mjm-h9j8-2c57","MINI-7p6w-qhrf-c927","MINI-7pfc-r4mv-986m","MINI-7q2g-rxv4-9vwp","MINI-7qhv-w4g3-9r5c","MINI-7qxr-pp38-j8xc","MINI-7r4g-r82g-fc87","MINI-7r64-862x-q9mg","MINI-7v89-7jm6-j42r","MINI-7w3v-xvv2-x38j","MINI-7w4j-r85v-4wmx","MINI-7w5m-mmg6-x5f7","MINI-7w94-q2h8-8wjg","MINI-7wvw-wqgj-4chm","MINI-8226-x3hp-8w8x","MINI-82c3-3472-pv32","MINI-8359-cmjp-c2w7","MINI-837r-fwj5-wggh","MINI-8545-p952-qx96","MINI-85rx-wr5v-jrxr","MINI-8735-wjj3-f93p","MINI-87m5-6jcj-5wfx","MINI-8829-m3h9-q935","MINI-8846-c887-jwjr","MINI-89pp-w7ph-6jwg","MINI-8c67-9jcj-4vrp","MINI-8c6m-83xg-55jj","MINI-8ccj-j2gp-4w87","MINI-8ch8-4fp6-qmqv","MINI-8cpm-vf25-fp3v","MINI-8gwx-96h3-jj26","MINI-8j7h-3p6x-wp5v","MINI-8jq4-9hqr-hcq6","MINI-8q5h-5rm7-8cqq","MINI-8qcm-cmw2-gxcv","MINI-8r6g-mc5g-3742","MINI-8rf4-hhmf-273c","MINI-8rhq-4rr3-hpmr","MINI-8rx7-j7q2-77r7","MINI-8w8x-f5q6-hwvf","MINI-8x67-7xc7-mvm8","MINI-927h-6j9v-68mq","MINI-92vx-g33w-27fw","MINI-93mm-xgfj-39q7","MINI-94g6-4x4x-5h2r","MINI-94r4-27cw-4rrc","MINI-95vm-8v5r-g2jf","MINI-96xx-r2qr-6gqg","MINI-97qw-6r2g-464c","MINI-989h-qv47-jw99","MINI-99j9-pp58-v7m8","MINI-99wv-7qg3-j283","MINI-9f9c-x8q3-4whm","MINI-9g4q-rx54-2r4r","MINI-9gcj-gjq6-h86m","MINI-9h39-rx9g-4cjw","MINI-9h6f-xqp3-4r8v","MINI-9h7x-cg59-8g44","MINI-9j2j-qpp7-wgxq","MINI-9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crypto/x509 library","requires_auth":"none","summary":"Attackers can bypass certificate name constraints by exploiting case sensitivity in wildcard DNS SANs, allowing unauthorized access via trusted chains.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Go","cpe":[{"product":"go","vendor":"golang"}],"cvss":{"score":7.5,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-295","name":"Improper Certificate Validation"},{"id":"CWE-1289","name":"Improper Validation of Unsafe Equivalence in Input"}],"description":"When verifying a certificate chain containing excluded DNS constraints, these constraints are not correctly applied to wildcard DNS SANs which use a different case than the constraint. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.","ecosystems":["AlmaLinux:10","Bitnami","Go","Red Hat:enterprise_linux:10.2","Red Hat:enterprise_linux_eus:10.0","Rocky Linux:10"],"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":"Case-sensitive excludedSubtrees name constraints cause Auth Bypass in crypto/x509","id":"CVE-2026-33810","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"golang:go","products":["golang:go"],"type":"auth_bypass","year":"2026"},"n_packages":15,"n_references":4,"next":{"headline":"Crash when handling long CNAME response in net","id":"CVE-2026-33811"},"packages":[{"ecosystem":"Bitnami","fixed":["1.26.2"],"introduced":["1.26.0-0"],"last_affected":[],"package":"golang","purl":"pkg:bitnami/golang","source":"BIT-golang-2026-33810"},{"ecosystem":"Go","fixed":["1.26.2"],"introduced":["1.26.0-0"],"last_affected":[],"package":"stdlib","purl":"pkg:golang/stdlib","source":"GO-2026-4866"},{"ecosystem":"AlmaLinux:10","fixed":["0.4.9.2-1.el10_2.2"],"introduced":["0"],"last_affected":[],"package":"yggdrasil","purl":"pkg:rpm/almalinux/yggdrasil","source":"ALSA-2026:57126"},{"ecosystem":"AlmaLinux:10","fixed":["0.4.9.2-1.el10_2.2"],"introduced":["0"],"last_affected":[],"package":"yggdrasil-devel","purl":"pkg:rpm/almalinux/yggdrasil-devel","source":"ALSA-2026:57126"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:0.4.9.2-1.el10_2.2"],"introduced":["0"],"last_affected":[],"package":"yggdrasil","purl":"pkg:rpm/redhat/yggdrasil","source":"RHSA-2026:57126"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:0.4.9.2-1.el10_2.2"],"introduced":["0"],"last_affected":[],"package":"yggdrasil-debuginfo","purl":"pkg:rpm/redhat/yggdrasil-debuginfo","source":"RHSA-2026:57126"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:0.4.9.2-1.el10_2.2"],"introduced":["0"],"last_affected":[],"package":"yggdrasil-debugsource","purl":"pkg:rpm/redhat/yggdrasil-debugsource","source":"RHSA-2026:57126"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:0.4.9.2-1.el10_2.2"],"introduced":["0"],"last_affected":[],"package":"yggdrasil-devel","purl":"pkg:rpm/redhat/yggdrasil-devel","source":"RHSA-2026:57126"},{"ecosystem":"Red Hat:enterprise_linux:10.2","fixed":["0:0.4.9.2-1.el10_2.2"],"introduced":["0"],"last_affected":[],"package":"yggdrasil-examples-debuginfo","purl":"pkg:rpm/redhat/yggdrasil-examples-debuginfo","source":"RHSA-2026:57126"},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","fixed":["0:0.4.7-6.el10_0"],"introduced":["0"],"last_affected":[],"package":"yggdrasil","purl":"pkg:rpm/redhat/yggdrasil","source":"RHSA-2026:67134"},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","fixed":["0:0.4.7-6.el10_0"],"introduced":["0"],"last_affected":[],"package":"yggdrasil-debuginfo","purl":"pkg:rpm/redhat/yggdrasil-debuginfo","source":"RHSA-2026:67134"},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","fixed":["0:0.4.7-6.el10_0"],"introduced":["0"],"last_affected":[],"package":"yggdrasil-debugsource","purl":"pkg:rpm/redhat/yggdrasil-debugsource","source":"RHSA-2026:67134"},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","fixed":["0:0.4.7-6.el10_0"],"introduced":["0"],"last_affected":[],"package":"yggdrasil-devel","purl":"pkg:rpm/redhat/yggdrasil-devel","source":"RHSA-2026:67134"},{"ecosystem":"Red Hat:enterprise_linux_eus:10.0","fixed":["0:0.4.7-6.el10_0"],"introduced":["0"],"last_affected":[],"package":"yggdrasil-examples-debuginfo","purl":"pkg:rpm/redhat/yggdrasil-examples-debuginfo","source":"RHSA-2026:67134"},{"ecosystem":"Rocky Linux:10","fixed":["0:0.4.9.2-1.el10_2.2"],"introduced":["0"],"last_affected":[],"package":"yggdrasil","purl":"pkg:rpm/rocky-linux/yggdrasil?distro=rocky-linux-10\u0026epoch=0","source":"RLSA-2026:57126"}],"prev":{"headline":"OOM from malicious IFD offset in golang.org/x/image/tiff","id":"CVE-2026-33809"},"products":["crypto/x509"],"published":"2026-04-08","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":"BSD","name":"Rocky Linux","prefix":"RLSA"},{"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":["Go standard library"]},"summary":"Attackers can bypass certificate name constraints by exploiting case sensitivity in wildcard DNS SANs, allowing unauthorized access via trusted chains.","url":"https://insights.sbomify.com/CVE-2026-33810/"}