{"schemaVersion":3,"id":"CVE-2026-102555","aliases":["UBUNTU-CVE-2026-102555","DEBIAN-CVE-2026-102555"],"status":"published","duplicateOf":null,"title":null,"description":"A flaw was found in libsoup. The soup_uri_decode_data_uri() function incorrectly treated base64 data-URI payloads as NUL-terminated strings when calling g_base64_decode_inplace(). If the percent-decoded payload contained embedded NUL bytes, the decoded length could remain uninitialized and be used as the size of the returned GBytes. This can lead to an out-of-bounds read or application crash when processing a crafted data URI.","dates":{"published":"2026-09-29T17:15:14.482Z","modified":"2026-10-15T16:43:05.721Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.2,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","exploitability":10,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","exploitability":10,"impact":7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":8.2,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00369,"percentile":0.29345,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-09-30T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00369,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00369,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00369,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00369,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00369,"percentile":0.29345}],"last30":[{"date":"2026-09-30T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00319,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00369,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00369,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00369,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00369,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00369,"percentile":0.29345}]},"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-125","name":"Out-of-bounds Read","description":"The product reads data past the end, or before the beginning, of the intended buffer.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/125.html"}],"affected":[{"vendor":"debian","product":"libsoup2.4","name":"libsoup2.4","label":"libsoup2.4","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libsoup2.4","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"debian","product":"libsoup3","name":"libsoup3","label":"libsoup3","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/libsoup3","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 3.8.0-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 3.8.0-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"libsoup2.4","name":"libsoup2.4","label":"libsoup2.4","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libsoup2.4","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"libsoup3","name":"libsoup3","label":"libsoup3","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libsoup3","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"gnome","product":"libsoup","name":"libsoup","label":"libsoup","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 3.7.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.7.3","eol":null,"hubHref":"/vendor/gnome/libsoup"},{"vendor":"redhat","product":"enterprise_linux","name":"enterprise linux","label":"enterprise_linux","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"9.0","noFixRecorded":false,"fixedIn":null},{"text":"10.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"9.0 | 10.0","eol":{"isEol":false,"eolDate":"2032-05-31T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"9","label":"9 (Upcoming ELS)","eolFrom":"2032-05-31T00:00:00.000Z","isLts":false,"isMaintained":true,"latestVersion":"9.8"},"product":{"name":"rhel","label":"Red Hat Enterprise Linux","category":"os"}},"hubHref":"/vendor/redhat/enterprise_linux"}],"affectedCount":6,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-102555","label":"access.redhat.com/security/cve/CVE-2026-102555","hostname":"access.redhat.com","tags":["VDB Entry","X Refsource REDHAT","REPORT","Mitigation","Vendor Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2543224","label":"bugzilla.redhat.com/show_bug.cgi?id=2543224","hostname":"bugzilla.redhat.com","tags":["Issue Tracking","X Refsource REDHAT","REPORT","Vendor Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-102555","label":"ubuntu.com/security/CVE-2026-102555","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-102555","label":"www.cve.org/CVERecord?id=CVE-2026-102555","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://gitlab.gnome.org/GNOME/libsoup/-/work_items/554","label":"gitlab.gnome.org/GNOME/libsoup/-/work_items/554","hostname":"gitlab.gnome.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-102555","label":"security-tracker.debian.org/tracker/CVE-2026-102555","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:83618","label":"access.redhat.com/errata/RHSA-2026:83618","hostname":"access.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT"]}],"lineage":{"upstream":[],"downstream":["RHSA-2026:83618","SUSE-SU-2026:4616-1","SUSE-SU-2026:4631-1"],"duplicates":[],"related":["SUSE-SU-2026:4616-1","SUSE-SU-2026:4631-1"]},"timeline":[{"kind":"published","date":"2026-09-29T17:15:14.482Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-15T16:43:05.721Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":33,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T18:25:20.456Z","stale":false,"partial":false}}