{"schemaVersion":3,"id":"CVE-2026-59648","aliases":["UBUNTU-CVE-2026-59648","DEBIAN-CVE-2026-59648"],"status":"published","duplicateOf":null,"title":null,"description":"In Bouncy Castle for Java before 1.85, OpenPGP Argon2 S2K honours attacker-chosen memory and passes. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcpg-fips 1.0.13 (1.0.X series), 2.0.13 (2.0.X series) and 2.1.13 (2.1.X series).","dates":{"published":"2026-08-03T00:45:34.967Z","modified":"2026-08-03T13:34:16.152Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.9,"severity":"medium","version":"4.0","versionLabel":"v4.0","source":"CVE.org","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:Amber","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":6.9,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:Amber","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Ubuntu","score":6.9,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:Amber","exploitability":null,"impact":null,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":10,"impact":2.3,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":10,"impact":2.3,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":6.9,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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:Amber","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00423,"percentile":0.35196,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":0.14800000000000005,"baselineDate":"2026-09-19T00:00:00.000Z","baselineScore":0.00275},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00423,"percentile":0.35196}],"last30":[{"date":"2026-09-19T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00275,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00423,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00423,"percentile":0.35196}]},"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-770","name":"Allocation of Resources Without Limits or Throttling","description":"The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/770.html"}],"affected":[{"vendor":"bouncycastle","product":"bc-java","name":"bc-java","label":"bc-java","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.85","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.85","eol":null,"hubHref":"/vendor/bouncycastle/bc-java"},{"vendor":"bouncycastle","product":"bcpg-fips","name":"bcpg-fips","label":"bcpg-fips","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 1.0.6, < 1.0.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 2.0.8, < 2.0.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 2.1.10, < 2.1.13","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 1.0.6, < 1.0.13 | ≥ 2.0.8, < 2.0.13 | ≥ 2.1.10, < 2.1.13","eol":null,"hubHref":"/vendor/bouncycastle/bcpg-fips"},{"vendor":"bouncycastle","product":"bouncy_castle_for_java_lts","name":"bouncy castle for java lts","label":"bouncy_castle_for_java_lts","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 2.73.11","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 2.73.11","eol":null,"hubHref":"/vendor/bouncycastle/bouncy_castle_for_java_lts"},{"vendor":"debian","product":"bouncycastle","name":"bouncycastle","label":"bouncycastle","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/bouncycastle","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 1.86-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 1.86-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"bouncycastle","name":"bouncycastle","label":"bouncycastle","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/bouncycastle","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"legion of the bouncy castle inc.","product":"bc-fja","name":"BC-FJA","label":"bc-fja","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 1.0.6, < 1.0.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 2.0.0, < 2.0.13","noFixRecorded":false,"fixedIn":null},{"text":"≥ 2.1.0, < 2.1.13","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 1.0.6, < 1.0.13 | ≥ 2.0.0, < 2.0.13 | ≥ 2.1.0, < 2.1.13","eol":null,"hubHref":"/vendor/legion_of_the_bouncy_castle_inc/bc-fja"},{"vendor":"legion of the bouncy castle inc.","product":"bc-java","name":"BC-JAVA","label":"bc-java","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 1.71, < 1.85","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 1.71, < 1.85","eol":null,"hubHref":"/vendor/legion_of_the_bouncy_castle_inc/bc-java"},{"vendor":"legion of the bouncy castle inc.","product":"bc-lts-java","name":"BC-LTS-JAVA","label":"bc-lts-java","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 2.73.0, < 2.73.12","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 2.73.0, < 2.73.12","eol":null,"hubHref":"/vendor/legion_of_the_bouncy_castle_inc/bc-lts-java"}],"affectedCount":8,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059648","label":"github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%9059648","hostname":"github.com","tags":["Vendor Advisory","REPORT","Third Party Advisory"]},{"url":"https://github.com/bcgit/bc-java/commit/c915cc3f7a8d58f5ea2f88f01dfef2d402dd0799","label":"github.com/bcgit/bc-java/commit/c915cc3f7a8d58f5ea2f88f01dfef2d402dd0799","hostname":"github.com","tags":["Patch","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-59648","label":"ubuntu.com/security/CVE-2026-59648","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-59648","label":"www.cve.org/CVERecord?id=CVE-2026-59648","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-59648","label":"security-tracker.debian.org/tracker/CVE-2026-59648","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2026:11445-1","OPENSUSE-SU-2026:21538-1","SUSE-SU-2026:23127-1","SUSE-SU-2026:23150-1","SUSE-SU-2026:3559-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:11445-1","OPENSUSE-SU-2026:21538-1","SUSE-SU-2026:23127-1","SUSE-SU-2026:23150-1","SUSE-SU-2026:3559-1"]},"timeline":[{"kind":"published","date":"2026-08-03T00:45:34.967Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-03T13:34:16.152Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":28,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T15:08:45.160Z","stale":false,"partial":false}}