{"answers":{"affected":"3 open source packages ship an affected version, including github.com/klever-io/klever-go.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-52879 exists.","fix":"Upgrade github.com/klever-io/klever-go to 1.7.18 or later.","what":"CVE-2026-52879 is a high-severity denial of service vulnerability in klever-io klever-go, published on 7 Aug 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-2026-52879 and fix it if it is affected.\n\nWhat it is: CVE-2026-52879 is a high-severity denial of service vulnerability in klever-io klever-go, published on 7 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-52879 exists.\n\nAffected packages and fixed versions:\n- github.com/klever-io/klever-go (Go): affected from 1.7.14; fixed in 1.7.18\n- github.com/klever-io/klever-go (Go): affected from 1.7.14; fixed in 1.7.18\n- github.com/klever-io/klever-go (Go): affected from 1.7.14; fixed in 1.7.18\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-2026-52879/ (Markdown: https://insights.sbomify.com/CVE-2026-52879/index.md)","id":"CVE-2026-52879","markdown":"https://insights.sbomify.com/CVE-2026-52879/index.md","name":"CVE-2026-52879","record":{"aliases":["GHSA-hf2g-6j7h-98wg","GO-2026-5424"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Klever blockchain node","requires_auth":"none","summary":"A remote attacker can cause denial of service in Klever-Go nodes by sending direct messages that trigger unbounded goroutine creation, exhausting system resources.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"},{"id":"CWE-400","name":"Uncontrolled Resource Consumption"}],"description":"Klever-Go is the Go implementation of the Klever blockchain protocol. In versions 1.7.14 through 1.7.17, the direct-message ingress handler spawns a new goroutine for every incoming direct message before the processor-level antiflood layer makes any admission decision, with no semaphore, throttler, or bound on the number of concurrent in-flight spawns. Because the antiflood check runs inside the spawned goroutine rather than before it, a single connected peer can open a direct-send stream and send a stream of well-formed messages to force unbounded goroutine creation, where each goroutine allocates its own stack and holds a message reference until processing completes, adding scheduler and garbage-collection pressure faster than the runtime can drain it. This lets one peer degrade the node's availability and its ability to process legitimate traffic, resulting in a remotely triggerable denial of service. The issue is fixed in 1.7.18.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Klever-Go: Unbounded goroutine spawn on direct-message ingress enables peer-driven DoS","id":"CVE-2026-52879","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":3,"n_references":2,"next":{"headline":"Klever-Go: REST API slow-header connection exhaustion via Gin Engine.Run","id":"CVE-2026-52880"},"packages":[{"ecosystem":"Go","fixed":["1.7.18"],"introduced":["1.7.14"],"last_affected":[],"package":"github.com/klever-io/klever-go","purl":null,"source":"GHSA-hf2g-6j7h-98wg"},{"ecosystem":"Go","fixed":["1.7.18"],"introduced":["1.7.14"],"last_affected":[],"package":"github.com/klever-io/klever-go","purl":"pkg:golang/github.com/klever-io/klever-go","source":"GHSA-hf2g-6j7h-98wg"},{"ecosystem":"Go","fixed":["1.7.18"],"introduced":["1.7.14"],"last_affected":[],"package":"github.com/klever-io/klever-go","purl":"pkg:golang/github.com/klever-io/klever-go","source":"GO-2026-5424"}],"prev":{"headline":"Klever-Go: Unauthenticated nil-pointer DoS in P2P transaction validation can halt the chain","id":"CVE-2026-52878"},"products":["klever-go"],"published":"2026-08-07","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":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-10","vendors":["klever-io"]},"summary":"A remote attacker can cause denial of service in Klever-Go nodes by sending direct messages that trigger unbounded goroutine creation, exhausting system resources.","url":"https://insights.sbomify.com/CVE-2026-52879/"}