{"id":"CVE-2026-44981","revision":null,"records":[{"revision":"a2ad6eeace6e4b0a920ed9545020d5cf","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44981","aliases":[],"title":"CrowdSec LAPI: Denial of Service via Unbounded Gzip Decompression","description":"CrowdSec offers crowdsourced protection against malicious IPs. From 1.7.0 until 1.7.8, the LAPI router used gin-contrib/gzip with DefaultDecompressHandle globally in pkg/apiserver/controllers/controller.go, causing /v1/watchers and /v1/watchers/login to decompress unauthenticated gzip-compressed JSON request bodies without enforcing a maximum decompressed size and allowing excessive heap allocation that can make LAPI unreachable. This issue is fixed in version 1.7.8.","state":0,"publishedAt":"2026-07-16T19:47:30.747+00:00","modifiedAt":"2026-07-17T13:50:30.497+00:00","affected":[{"ecosystem":"Vendor product","name":"crowdsec","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"crowdsecurity\",\n                    \"product\": \"crowdsec\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 1.7.0, < 1.7.8\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.2,"severity":"HIGH"}],"references":["https://github.com/crowdsecurity/crowdsec/security/advisories/GHSA-273h-gvwr-c3qj","https://github.com/crowdsecurity/crowdsec/commit/54a0dfe6c16b7687b0da6634e0b19ef0f5d9bb30","https://github.com/crowdsecurity/crowdsec/commit/56d0d6915f7f25941dc5b4f484028646f6601a37"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-44981","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-44981","identifiers":["CVE-2026-44981"]},"retained":false,"historicalAffected":[]},{"revision":"37515298bcd94acc9f3a589e989dfca8","observedAt":"2026-10-25T10:17:33.838+00:00","statement":{"source":"nvd","id":"CVE-2026-44981","aliases":[],"title":"CrowdSec offers crowdsourced protection against malicious IPs. 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This issue is fixed in version 1.7.8.","state":0,"publishedAt":"2026-07-16T20:16:44.9+00:00","modifiedAt":"2026-10-24T20:10:00.137+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":8.2,"severity":"HIGH"}],"references":["https://github.com/crowdsecurity/crowdsec/commit/54a0dfe6c16b7687b0da6634e0b19ef0f5d9bb30","https://github.com/crowdsecurity/crowdsec/commit/56d0d6915f7f25941dc5b4f484028646f6601a37","https://github.com/crowdsecurity/crowdsec/security/advisories/GHSA-273h-gvwr-c3qj"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-44981","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-409"],"productCriteria":[],"sourceDates":{"published":"2026-07-16T20:16:44.900","lastModified":"2026-10-24T20:10:00.137"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-44981","identifiers":["CVE-2026-44981"]},"retained":false,"historicalAffected":[]},{"revision":"5bc10e2f7e544af2a7402868482612f4","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-273h-gvwr-c3qj","aliases":["CVE-2026-44981","GO-2026-5041"],"title":"CrowdSec LAPI: Denial of Service via Unbounded Gzip Decompression","description":"The LAPI router uses `gin-contrib/gzip` with `DefaultDecompressHandle` globally (`pkg/apiserver/controllers/controller.go`).\nThis middleware decompresses incoming request bodies without enforcing a maximum decompressed size. \n\nThe endpoints `/v1/watchers` or `/v1/watchers/login` require no authentication.\nAn attacker can send small gzip-compressed JSON payloads that, when decompressed, result in hundreds of MB of valid JSON occupying server memory.\nSending enough requests concurrently will cause LAPI to allocate excessive heap memory, leading the OS to forcibly terminate the process.\n \nThis vulnerability is not exploitable from the network in default configurations, as LAPI only listens on the loopback interface.\nIf developers' applications are using a multi-server setup, LAPI will be exposed in the network, in which case they are at risk if untrusted IPs can access it.\n \n### Impact\n\nExploiting this vulnerability will make LAPI unreachable, meaning that bouncers will not be able to fetch new decisions (but existing decisions will still be enforced) and log processors will not be able to send alerts, effectively denying the creation of new decisions.\n\n### Workarounds\n\nIf the LAPI is exposed on the network (either directly or through a reverse proxy), for example in the case of a multi-server deployment, restrict access to trusted IP addresses.","state":0,"publishedAt":"2026-05-27T19:57:28+00:00","modifiedAt":"2026-06-17T00:26:11.6090387+00:00","affected":[{"ecosystem":"Go","name":"github.com/crowdsecurity/crowdsec","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"1.7.0"},{"kind":"fixed","version":"1.7.8"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/crowdsecurity/crowdsec/security/advisories/GHSA-273h-gvwr-c3qj","https://github.com/crowdsecurity/crowdsec","https://github.com/crowdsecurity/crowdsec/releases/tag/v1.7.8"],"sourceUrl":"https://github.com/advisories/GHSA-273h-gvwr-c3qj","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-273h-gvwr-c3qj","identifiers":["GHSA-273h-gvwr-c3qj","CVE-2026-44981","GO-2026-5041"]},"retained":false,"historicalAffected":[]},{"revision":"3e78f8026c76479bb7dccc36efe9f1f1","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-5041","aliases":["CVE-2026-44981","GHSA-273h-gvwr-c3qj"],"title":"CrowdSec LAPI: Denial of Service via Unbounded Gzip Decompression in github.com/crowdsecurity/crowdsec","description":"CrowdSec LAPI: Denial of Service via Unbounded Gzip Decompression in github.com/crowdsecurity/crowdsec","state":0,"publishedAt":"2026-06-16T23:55:18+00:00","modifiedAt":"2026-06-17T00:15:12.8705818+00:00","affected":[{"ecosystem":"Go","name":"github.com/crowdsecurity/crowdsec","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"1.7.0"},{"kind":"fixed","version":"1.7.8"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/crowdsecurity/crowdsec/security/advisories/GHSA-273h-gvwr-c3qj","https://github.com/crowdsecurity/crowdsec/releases/tag/v1.7.8"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-5041","license":"OSV · upstream source license applies","key":"osv:GO-2026-5041","identifiers":["GO-2026-5041","CVE-2026-44981","GHSA-273h-gvwr-c3qj"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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