{"answers":{"affected":"10 open source packages ship an affected version, including github.com/coder/coder/v2 and github.com/coder/coder.","exploited":"There is no known exploitation of CVE-2026-63443 in the wild and no public exploit code.","fix":"Upgrade github.com/coder/coder/v2 to a fixed version for your release line: 2.29.19, 2.32.9, 2.33.10 or 2.34.4.","what":"CVE-2026-63443 is a high-severity server-side request forgery vulnerability in coder, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-63443 and fix it if it is affected.\n\nWhat it is: CVE-2026-63443 is a high-severity server-side request forgery vulnerability in coder, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-63443 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- github.com/coder/coder/v2 (Go): affected from 2.27.0; fixed in 2.29.19, 2.32.9, 2.33.10, 2.34.4\n- github.com/coder/coder/v2 (Go): affected from 2.27.0; fixed in 2.29.19\n- github.com/coder/coder/v2 (Go): affected from 2.27.0; fixed in 2.29.19\n- github.com/coder/coder/v2 (Go): affected from 2.30.0; fixed in 2.32.9\n- github.com/coder/coder/v2 (Go): affected from 2.30.0; fixed in 2.32.9\n- github.com/coder/coder/v2 (Go): affected from 2.33.0; fixed in 2.33.10\n- github.com/coder/coder/v2 (Go): affected from 2.33.0; fixed in 2.33.10\n- github.com/coder/coder/v2 (Go): affected from 2.34.0; fixed in 2.34.4\n- github.com/coder/coder/v2 (Go): affected from 2.34.0; fixed in 2.34.4\n- github.com/coder/coder (Go): affected all versions; no fix listed\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-2026-63443/ (Markdown: https://insights.sbomify.com/CVE-2026-63443/index.md)","id":"CVE-2026-63443","markdown":"https://insights.sbomify.com/CVE-2026-63443/index.md","name":"CVE-2026-63443","record":{"aliases":["GHSA-qrwj-vh9x-gw5v","GO-2026-5923"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["data_read","data_modify","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Coder remote dev platform","requires_auth":"low_privilege","summary":"Authenticated users can exploit insecure redirect handling to read, write files, or execute commands on other workspace agents, crossing tenant boundaries.","user_interaction":"not_required","vuln_class":"ssrf"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L","version":"3.1"},"cwes":[{"id":"CWE-918","name":"Server-Side Request Forgery"},{"id":"CWE-863","name":"Incorrect Authorization"}],"description":"Coder allows organizations to provision remote development environments via Terraform. Prior to 2.29.19, 2.32.9, 2.33.10, and 2.34.4, agentConn.apiClient() follows redirects while its custom transport accepts the host from the redirected request URL when the port is the workspace agent HTTP API port 4. An authenticated user who controls a modified workspace agent and knows another online agent's UUID can derive the victim's tailnet address and redirect control-plane requests to that agent. HTTP 301, 302, and 303 redirects can redirect read requests, while HTTP 307 and 308 preserve replayable write and process-start requests. The redirected workspace agent file APIs can read or write files as the victim workspace user, and affected versions exposing the workspace agent process API can execute commands after a redirected file write, crossing workspace and tenant boundaries. This issue is fixed in versions 2.29.19, 2.32.9, 2.33.10, and 2.34.4.","ecosystems":["Go"],"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":"Coder: Workspace agent API insecure redirect handling allowed cross-agent file read and write","id":"CVE-2026-63443","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"ssrf","year":"2026"},"n_packages":10,"n_references":15,"next":{"headline":"Perses: Unvalidated project parameter enables filesystem path traversal","id":"CVE-2026-63445"},"packages":[{"ecosystem":"Go","fixed":[],"introduced":["0"],"last_affected":[],"package":"github.com/coder/coder","purl":"pkg:golang/github.com/coder/coder","source":"GO-2026-5923"},{"ecosystem":"Go","fixed":["2.29.19","2.32.9","2.33.10","2.34.4"],"introduced":["2.27.0","2.30.0","2.33.0","2.34.0"],"last_affected":[],"package":"github.com/coder/coder/v2","purl":"pkg:golang/github.com/coder/coder/v2","source":"GO-2026-5923"},{"ecosystem":"Go","fixed":["2.29.19"],"introduced":["2.27.0"],"last_affected":[],"package":"github.com/coder/coder/v2","purl":null,"source":"GHSA-qrwj-vh9x-gw5v"},{"ecosystem":"Go","fixed":["2.29.19"],"introduced":["2.27.0"],"last_affected":[],"package":"github.com/coder/coder/v2","purl":"pkg:golang/github.com/coder/coder/v2","source":"GHSA-qrwj-vh9x-gw5v"},{"ecosystem":"Go","fixed":["2.32.9"],"introduced":["2.30.0"],"last_affected":[],"package":"github.com/coder/coder/v2","purl":null,"source":"GHSA-qrwj-vh9x-gw5v"},{"ecosystem":"Go","fixed":["2.32.9"],"introduced":["2.30.0"],"last_affected":[],"package":"github.com/coder/coder/v2","purl":"pkg:golang/github.com/coder/coder/v2","source":"GHSA-qrwj-vh9x-gw5v"},{"ecosystem":"Go","fixed":["2.33.10"],"introduced":["2.33.0"],"last_affected":[],"package":"github.com/coder/coder/v2","purl":null,"source":"GHSA-qrwj-vh9x-gw5v"},{"ecosystem":"Go","fixed":["2.33.10"],"introduced":["2.33.0"],"last_affected":[],"package":"github.com/coder/coder/v2","purl":"pkg:golang/github.com/coder/coder/v2","source":"GHSA-qrwj-vh9x-gw5v"},{"ecosystem":"Go","fixed":["2.34.4"],"introduced":["2.34.0"],"last_affected":[],"package":"github.com/coder/coder/v2","purl":null,"source":"GHSA-qrwj-vh9x-gw5v"},{"ecosystem":"Go","fixed":["2.34.4"],"introduced":["2.34.0"],"last_affected":[],"package":"github.com/coder/coder/v2","purl":"pkg:golang/github.com/coder/coder/v2","source":"GHSA-qrwj-vh9x-gw5v"}],"prev":{"headline":"OPNsense: Log Forgery via Login Username CRLF in WebGUI Authentication → Pf Table IP Blocking","id":"CVE-2026-63442"},"products":["coder"],"published":"2026-09-15","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":"Go Vulnerability Database","prefix":"GO"},{"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":"total"},"state":"PUBLISHED","updated":"2026-09-15","vendors":["coder"]},"summary":"Authenticated users can exploit insecure redirect handling to read, write files, or execute commands on other workspace agents, crossing tenant boundaries.","url":"https://insights.sbomify.com/CVE-2026-63443/"}