{"answers":{"affected":"7 open source packages ship an affected version, including go.temporal.io/server.","exploited":"There is no known exploitation of CVE-2025-8396 in the wild and no public exploit code.","fix":"Upgrade go.temporal.io/server to a fixed version for your release line: 1.26.3, 1.27.3 or 1.28.1.","what":"CVE-2025-8396 is a medium-severity denial of service vulnerability in Temporal OSS Server, published on 15 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-8396 and fix it if it is affected.\n\nWhat it is: CVE-2025-8396 is a medium-severity denial of service vulnerability in Temporal OSS Server, published on 15 Sep 2025. 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-2025-8396 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- go.temporal.io/server (Go): affected all versions; fixed in 1.26.3, 1.27.3, 1.28.1\n- go.temporal.io/server (Go): affected all versions; fixed in 1.26.3\n- go.temporal.io/server (Go): affected all versions; fixed in 1.26.3\n- go.temporal.io/server (Go): affected from 1.27.0-126.0; fixed in 1.27.3\n- go.temporal.io/server (Go): affected from 1.27.0-126.0; fixed in 1.27.3\n- go.temporal.io/server (Go): affected from 1.28.0-129.0; fixed in 1.28.1\n- go.temporal.io/server (Go): affected from 1.28.0-129.0; fixed in 1.28.1\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-2025-8396/ (Markdown: https://insights.sbomify.com/CVE-2025-8396/index.md)","id":"CVE-2025-8396","markdown":"https://insights.sbomify.com/CVE-2025-8396/index.md","name":"CVE-2025-8396","record":{"aliases":["ECHO-845c-6885-6d2a","GHSA-p768-c3pr-6459","GO-2025-3953"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Temporal OSS Server","requires_auth":"none","summary":"Attackers can cause denial of service in Temporal OSS Server via excessive memory allocation triggered by insufficient bounds checking on authorization headers.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Temporal","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/S:N/AU:Y","version":"4.0"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"Insufficiently specific bounds checking on authorization header could lead to denial of service in the Temporal server on all platforms due to excessive memory allocation.This issue affects all platforms and versions of OSS Server prior to 1.26.3, 1.27.3, and 1.28.1 (i.e., fixed in 1.26.3, 1.27.3, and 1.28.1 and later). Temporal Cloud services are not impacted.","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":"Temporal OSS Server Vulnerable to Allocation of Resources Without Limits or Throttling","id":"CVE-2025-8396","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2025"},"n_packages":7,"n_references":3,"next":{"headline":"Save as PDF Button \u003c= 1.9.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via restpackpdfbutton Shortcode","id":"CVE-2025-8397"},"packages":[{"ecosystem":"Go","fixed":["1.26.3","1.27.3","1.28.1"],"introduced":["0","1.27.0-126.0","1.28.0-129.0"],"last_affected":[],"package":"go.temporal.io/server","purl":"pkg:golang/go.temporal.io/server","source":"GO-2025-3953"},{"ecosystem":"Go","fixed":["1.26.3"],"introduced":["0"],"last_affected":[],"package":"go.temporal.io/server","purl":null,"source":"GHSA-p768-c3pr-6459"},{"ecosystem":"Go","fixed":["1.26.3"],"introduced":["0"],"last_affected":[],"package":"go.temporal.io/server","purl":"pkg:golang/go.temporal.io/server","source":"GHSA-p768-c3pr-6459"},{"ecosystem":"Go","fixed":["1.27.3"],"introduced":["1.27.0-126.0"],"last_affected":[],"package":"go.temporal.io/server","purl":null,"source":"GHSA-p768-c3pr-6459"},{"ecosystem":"Go","fixed":["1.27.3"],"introduced":["1.27.0-126.0"],"last_affected":[],"package":"go.temporal.io/server","purl":"pkg:golang/go.temporal.io/server","source":"GHSA-p768-c3pr-6459"},{"ecosystem":"Go","fixed":["1.28.1"],"introduced":["1.28.0-129.0"],"last_affected":[],"package":"go.temporal.io/server","purl":null,"source":"GHSA-p768-c3pr-6459"},{"ecosystem":"Go","fixed":["1.28.1"],"introduced":["1.28.0-129.0"],"last_affected":[],"package":"go.temporal.io/server","purl":"pkg:golang/go.temporal.io/server","source":"GHSA-p768-c3pr-6459"}],"prev":{"headline":"This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.","id":"CVE-2025-8395"},"products":["OSS Server"],"published":"2025-09-15","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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-09-15","vendors":["Temporal"]},"summary":"Attackers can cause denial of service in Temporal OSS Server via excessive memory allocation triggered by insufficient bounds checking on authorization headers.","url":"https://insights.sbomify.com/CVE-2025-8396/"}