{"schemaVersion":3,"id":"CVE-2018-18926","aliases":["UBUNTU-CVE-2018-18926","GHSA-hf6f-jq25-8gq9","GO-2022-0844"],"status":"published","duplicateOf":null,"title":null,"description":"Gitea before 1.5.4 allows remote code execution because it does not properly validate session IDs. This is related to session ID handling in the go-macaron/session code for Macaron.","dates":{"published":"2018-11-04T06:00:00.000Z","modified":"2024-08-05T11:23:08.554Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.0","versionLabel":"v3.0","source":"NVD","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.0","versionLabel":"v3.0","source":"NVD","score":9.8,"severity":"critical","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":7.5,"severity":"high","vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","exploitability":null,"impact":null,"computed":false},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Ubuntu","score":9.8,"severity":"critical","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true},{"version":"3.0","versionLabel":"v3.0","source":"OSV · Go","score":9.8,"severity":"critical","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true}]},"epss":{"probability":0.03041,"percentile":0.87317,"severity":"low","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-18T00:00:00.000Z","baselineScore":0.03041},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02868,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.03041,"percentile":0.87317}],"last30":[{"date":"2026-09-18T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.02868,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.03041,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.03041,"percentile":0.87317}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-384","name":"Session Fixation","description":"Authenticating a user, or otherwise establishing a new user session, without invalidating any existing session identifier gives an attacker the opportunity to steal authenticated sessions.","type":"weakness","status":"Incomplete","abstraction":"Compound","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/384.html"}],"affected":[{"vendor":"ubuntu","product":"golang-code.gitea-git","name":"golang-code.gitea-git","label":"golang-code.gitea-git","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/golang-code.gitea-git","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"gitea","product":"gitea","name":"Gitea","label":"gitea","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.5.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.5.4","eol":null,"hubHref":"/vendor/gitea/gitea"},{"vendor":"code.gitea.io","product":"gitea","name":"code.gitea.io/gitea","label":"gitea","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/code.gitea.io/gitea","purlType":"golang","versions":[{"text":"< 1.5.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.5.2","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/go-gitea/gitea/issues/5140","label":"github.com/go-gitea/gitea/issues/5140","hostname":"github.com","tags":["X Refsource MISC","Mitigation","Patch","Third Party Advisory","REPORT","WEB"]},{"url":"https://ubuntu.com/security/CVE-2018-18926","label":"ubuntu.com/security/CVE-2018-18926","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2018-18926","label":"www.cve.org/CVERecord?id=CVE-2018-18926","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-18926","label":"nvd.nist.gov/vuln/detail/CVE-2018-18926","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/go-gitea/gitea/pull/5177","label":"github.com/go-gitea/gitea/pull/5177","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/go-gitea/gitea/commit/aeb5655c25053bdcd7eee94ea37df88468374162","label":"github.com/go-gitea/gitea/commit/aeb5655c25053bdcd7eee94ea37df88468374162","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/advisories/GHSA-hf6f-jq25-8gq9","label":"github.com/advisories/GHSA-hf6f-jq25-8gq9","hostname":"github.com","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2018-11-04T06:00:00.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-08-05T11:23:08.554Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T12:48:33.858Z","stale":false,"partial":false}}