{"id":"CVE-2026-5190","aliases":["EUVD-2026-17575","GHSA-xvjw-fjq5-68hf","openSUSE-SU-2026:10512-1","openSUSE-SU-2026:20477-1"],"status":"published","title":"AWS C Event Stream Streaming Decoder Stack Buffer Overflow","description":"Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages.\n\n\n\nTo remediate this issue, users should upgrade to version 0.6.0 or later.","severity":{"version":"4.0","score":7.7,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00422,"percentile":0.36942,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-787"],"published":"2026-03-31T17:05:59Z","modified":"2026-10-28T11:09:50Z","fixes":[{"ecosystem":"openSUSE:Tumbleweed","package":"aws-c-event-stream","fixed_in":["0.7.0-1.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Leap 16.0","package":"aws-c-event-stream","fixed_in":["0.4.2-bp160.2.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"aws-c-event-stream","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7.0-1.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Leap 16.0","package":"aws-c-event-stream","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.4.2-bp160.2.1"}]}]}],"products":[{"vendor":"aws","product":"aws-c-event-stream"}],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-011-aws/","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/awslabs/aws-c-event-stream/security/advisories/GHSA-xvjw-fjq5-68hf","tags":["third-party-advisory","advisory"]},{"url":"https://github.com/awslabs/aws-c-event-stream/releases/tag/v0.6.0","tags":["patch","fix"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5190.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5190","tags":["advisory"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-5190","tags":["web"]},{"url":"https://bugzilla.suse.com/1261298","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-5190","title":"AWS C Event Stream Streaming Decoder Stack Buffer Overflow","description":"Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages.\n\n\n\nTo remediate this issue, users should upgrade to version 0.6.0 or later.","status":"published","published":"2026-03-31T17:05:59.601Z","modified":"2026-10-20T18:16:59.122Z","cvss":[{"version":"4.0","score":7.7,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T13:39:16.730222Z"}],"euvd":[{"id":"EUVD-2026-17575","description":"Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages.\n\n\n\nTo remediate this issue, users should upgrade to version 0.6.0 or later.","status":"published","published":"2026-03-31T17:05:59Z","modified":"2026-10-20T18:16:59Z","cvss":[{"version":"4.0","score":7.7,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:59:43.145678Z"}],"nvd":[{"id":"CVE-2026-5190","description":"Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages.\n\n\n\nTo remediate this issue, users should upgrade to version 0.6.0 or later.","status":"published","published":"2026-03-31T18:16:59.08Z","modified":"2026-10-20T19:17:38.93Z","cvss":[{"version":"4.0","score":7.7,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/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","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:12:12.261218Z"}],"osv":[{"id":"CVE-2026-5190","title":"AWS C Event Stream Streaming Decoder Stack Buffer Overflow","description":"Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages.\n\n\n\nTo remediate this issue, users should upgrade to version 0.6.0 or later.","status":"published","published":"2026-03-31T17:05:59.601Z","modified":"2026-10-28T11:09:50.022278497Z","cvss":[{"version":"4.0","score":7.7,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T15:45:07.431113Z"},{"id":"openSUSE-SU-2026:10512-1","title":"aws-c-event-stream-devel-0.7.0-1.1 on GA media","description":"These are all security issues fixed in the aws-c-event-stream-devel-0.7.0-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-04-09T00:00:00Z","modified":"2026-04-10T09:46:00.832624Z","updated_at":"2026-11-02T16:58:38.415593Z"},{"id":"openSUSE-SU-2026:20477-1","title":"Security update for aws-c-event-stream","description":"This update for aws-c-event-stream fixes the following issues:\n\nChanges in aws-c-event-stream:\n\n- CVE-2026-5190: Fixed a out-of-bounds write caused by crafted event-stream messages (bsc#1261298)\n","status":"published","published":"2026-04-08T13:03:50Z","modified":"2026-04-10T18:24:17.129625Z","updated_at":"2026-11-02T16:58:41.463445Z"}]}}