CVE-2026-59641

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Source
https://cve.org/CVERecord?id=CVE-2026-59641
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59641.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-59641
Downstream
Related
Published
2026-08-03T00:54:21.151Z
Modified
2026-08-14T18:51:37.977459712Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/U:Amber CVSS Calculator
Summary
S/MIME validator trusts signer-asserted signingTime for path validation
Details

In Bouncy Castle for Java before 1.85, S/MIME validator trusts signer-asserted signingTime for path validation. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bcmail-fips and bcjmail-fips 1.0.7 (1.0.X series), 2.0.7 (2.0.X series) and 2.1.7 (2.1.X series).

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/59xxx/CVE-2026-59641.json",
    "unresolved_ranges": [
        {
            "source": "AFFECTED_FIELD",
            "extracted_events": [
                {
                    "introduced": "1.0.0"
                },
                {
                    "fixed": "1.0.7"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.7"
                },
                {
                    "introduced": "2.1.0"
                },
                {
                    "fixed": "2.1.7"
                },
                {
                    "introduced": "1.0.4"
                },
                {
                    "fixed": "1.0.7"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.7"
                },
                {
                    "introduced": "2.1.0"
                },
                {
                    "fixed": "2.1.7"
                }
            ]
        }
    ],
    "cwe_ids": [
        "CWE-345"
    ],
    "cna_assigner": "bcorg"
}
References

Affected packages

Git / github.com/bcgit/bc-java

Affected ranges

Type
GIT
Repo
https://github.com/bcgit/bc-java
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
57fbd3c501f7a369f64eda311d6a709fc0bcae84
Fixed
2f81b22d559b3a1b026388e1ca78dd547384def8
Fixed
fd89fe918b37fea1c71e95fae50284a325b09721
Database specific
Show details 
{
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.85"
        }
    ]
}
Type
GIT
Repo
https://github.com/bcgit/bc-lts-java
Events
Introduced
468b5082f3f0971e80bf9edb7029c17b39b9ba0c
Fixed
f101b232c5d3e07ecdd504210a57e43831d6cd65
Database specific
Show details 
{
    "source": "AFFECTED_FIELD",
    "extracted_events": [
        {
            "introduced": "2.73.0"
        },
        {
            "fixed": "2.73.12"
        }
    ]
}

Affected versions

Other
r1rv73
r1rv74
r1rv75
r1rv76
r1rv77
r1rv78
r1rv80
r1rv81
r1rv82
r1rv83
r1rv84
r2rv73dot0
r2rv73dot1
r2rv73dot10
r2rv73dot11
r2rv73dot3
r2rv73dot4
r2rv73dot6
r2rv73dot8
r2rv73dot9

Database specific

vanir_signatures 
[
    {
        "id": "CVE-2026-59641-4ce1d97a",
        "deprecated": false,
        "source": "https://github.com/bcgit/bc-java/commit/2f81b22d559b3a1b026388e1ca78dd547384def8",
        "digest": {
            "function_hash": "155941734944056653406735003052750441390",
            "length": 3295.0
        },
        "signature_version": "v1",
        "target": {
            "function": "validateSignatures",
            "file": "mail/src/main/java/org/bouncycastle/mail/smime/validator/SignedMailValidator.java"
        },
        "signature_type": "Function"
    },
    {
        "id": "CVE-2026-59641-500e27e4",
        "deprecated": false,
        "source": "https://github.com/bcgit/bc-java/commit/2f81b22d559b3a1b026388e1ca78dd547384def8",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "207747212477977674939160107484409524562",
                "107893303612767664607659532509950872690",
                "294478676154263065746793644695584953367",
                "332400467954034174403488105896051707945",
                "166684533282393669024848663329306582191",
                "96550477364359879753081134070507738357",
                "168657255977431037477757282589490177995",
                "37561944842681533658117429161957455635",
                "2424365952130970358314372267581488836",
                "117233453173016214895009441861771869818"
            ]
        },
        "signature_version": "v1",
        "target": {
            "file": "mail/src/main/java/org/bouncycastle/mail/smime/validator/SignedMailValidator.java"
        },
        "signature_type": "Line"
    },
    {
        "id": "CVE-2026-59641-ebfae1b3",
        "signature_version": "v1",
        "source": "https://github.com/bcgit/bc-java/commit/2f81b22d559b3a1b026388e1ca78dd547384def8",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "228157656341731385850742172751817324824",
                "290129525889320755044275395950464241156",
                "294668419834152063851279272971834535051",
                "253161207035509057598500743690836244561",
                "94813197025758984023770005944599136668",
                "178355299770964173506783650204454382780",
                "56451136722370907714138023583556541414",
                "204760115266163874667798439061488386767",
                "155473473083933483057874227626324505678",
                "331709184139310507183578503100177529422",
                "253480188392965481826996684238270823098",
                "92171346442195647531110981406242470117",
                "268605583759103205374674123933920557055"
            ]
        },
        "target": {
            "file": "mail/src/test/java/org/bouncycastle/mail/smime/test/SignedMailValidatorTest.java"
        },
        "deprecated": false,
        "signature_type": "Line"
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-59641.json"
vanir_signatures_modified 
"2026-08-12T16:41:37Z"