CVE-2026-12817

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Source
https://cve.org/CVERecord?id=CVE-2026-12817
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-12817.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-12817
Downstream
CLEANSTART (3)
DEBIAN (1)
openSUSE (2)
SUSE (3)
UBUNTU (1)
Related
openSUSE (2)
SUSE (3)
Published
2026-08-03T02:54:16Z
Modified
2026-10-16T09:47:54Z
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
OpenPGP AEAD decryption skips final tag on chunk-aligned data
Details

In Bouncy Castle for Java before 1.85, OpenPGP AEAD decryption skips final tag on chunk-aligned data. 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).

Database specific 
{
    "cna_assigner": "bcorg",
    "cwe_ids": [
        "CWE-354"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12817.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "range": [
                        {
                            "introduced": "1.0.7"
                        },
                        {
                            "fixed": "1.0.13"
                        },
                        {
                            "introduced": "2.0.0"
                        },
                        {
                            "fixed": "2.0.13"
                        },
                        {
                            "introduced": "2.1.0"
                        },
                        {
                            "fixed": "2.1.13"
                        }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/bcgit/bc-java

Affected ranges

Type
GIT
Repo
https://github.com/bcgit/bc-java
Events
Introduced
434cab9b79adfcc7d0313fbaec765a5bbfb27128
Fixed
57fbd3c501f7a369f64eda311d6a709fc0bcae84
Fixed
4b712819846ec944379f4909101abac20f0ad4b0
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "1.74"
                },
                {
                    "fixed": "1.85"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "fixed": "4b712819846ec944379f4909101abac20f0ad4b0"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}
Type
GIT
Repo
https://github.com/bcgit/bc-lts-java
Events
Introduced
468b5082f3f0971e80bf9edb7029c17b39b9ba0c
Fixed
f101b232c5d3e07ecdd504210a57e43831d6cd65
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "2.73.0"
                },
                {
                    "fixed": "2.73.12"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "cpe": "cpe:2.3:a:bouncycastle:bouncy_castle_for_java_lts:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "last_affected": "2.73.11"
                }
            ],
            "source": "CPE_RANGE"
        }
    ]
}

Affected versions

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

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-12817.json"
vanir_signatures 
[
    {
        "deprecated": false,
        "digest": {
            "function_hash": "16083184918046524259832498717319292839",
            "length": 1522
        },
        "id": "CVE-2026-12817-8835a78c",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/bcgit/bc-java/commit/4b712819846ec944379f4909101abac20f0ad4b0",
        "target": {
            "file": "pg/src/main/java/org/bouncycastle/openpgp/operator/jcajce/JceAEADUtil.java",
            "function": "readBlock"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "156424183833880622931663594447408166542",
            "length": 1293
        },
        "id": "CVE-2026-12817-bf38bae0",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/bcgit/bc-java/commit/4b712819846ec944379f4909101abac20f0ad4b0",
        "target": {
            "file": "pg/src/main/java/org/bouncycastle/openpgp/operator/bc/BcAEADUtil.java",
            "function": "readBlock"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "23409770334678352525744829040216707647",
                "60407602609116237066470850339965921888",
                "133218309895992399925992003428061339983",
                "35249125813584904882881814962928506251",
                "121906986628058013311409130484452967859",
                "305706954486167274336417578286986984339",
                "238309882958147862669029911058538564160",
                "137197919732040466659166642570582373611",
                "95217606141935041231547386614963573515",
                "223364304285699327041013416814457506521",
                "204447726537376946533702522411243146272",
                "23548177608954438727592319977415513377",
                "17124063929837695553625067504462698457",
                "247595136991316893756020492224270378432",
                "80388849288704793875175804673656827038",
                "188686785466766958713612829967335824068",
                "340249818245801259809168314441790176957",
                "162787026349802863129858172436756391163",
                "112719712714028687141035541051460954428",
                "154716980870010059793607857890439440919",
                "5285720951433613963795373812659097643",
                "23751919968105767578888304747031918254",
                "231875247177426609607684091836109314866",
                "34452144887908150219199365195243340477",
                "87899662189280824431404963715352089163",
                "315404155893764959686058396258332560897",
                "138299659296792568595602673841824810408",
                "333074141710635353878506192750459148821",
                "210725009364154454332731467996692005180",
                "259642482114939965979293065292366786878",
                "252832954442105133934933966018921906870",
                "13951468585376060320208661053699626716"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-12817-cfece60d",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/bcgit/bc-java/commit/4b712819846ec944379f4909101abac20f0ad4b0",
        "target": {
            "file": "pg/src/main/java/org/bouncycastle/openpgp/operator/jcajce/JceAEADUtil.java"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "275019368594245736914854647794622230610",
                "61302347608695940798780889440109221090",
                "38286605154181458274038744228082990515",
                "76680160295335290251664471681619082311",
                "250703071120492576547838969578884953355",
                "301619156539220241862244235716249111831"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-12817-d2895c80",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/bcgit/bc-java/commit/4b712819846ec944379f4909101abac20f0ad4b0",
        "target": {
            "file": "pg/src/test/java/org/bouncycastle/openpgp/test/PGPAeadTest.java"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "23409770334678352525744829040216707647",
                "149993882992683389688168405975403939336",
                "8173035150427969103056162793179880882",
                "121442771103606181199253528340949359503",
                "219265088040273446654039685321518641238",
                "17473303923054566738335145167128510683",
                "238309882958147862669029911058538564160",
                "132435483978606640996367807424871582416",
                "270862710398340104233038775786626808993",
                "219054031375837328507432636010670483234",
                "185427789123329953784429620555993881259",
                "278381369956234533219140800746883492019",
                "218686486528278175074254312553211339736",
                "315477712444163757587690878674302061494",
                "223238899261523105762370292257358171007",
                "279879628809766113043379339745926955047",
                "266004287522667266767400996654872503229",
                "38598758357870008277433383197359100214",
                "282451736130761167035411763614196248236",
                "127652780093128108177668657245088550933",
                "30725424810954320995147007028187639209",
                "127319507348368465215894271571395504719",
                "86462049007469755159785094936595248817",
                "315404155893764959686058396258332560897",
                "138299659296792568595602673841824810408",
                "333074141710635353878506192750459148821",
                "253298648774945782342122309059523229431",
                "222683153430813134343719401643243358375",
                "318671400151748795567815648254547792122",
                "127888650621437705049535439678512667613",
                "99473210598448393163984098780704055229",
                "202174728865164453205095729957062277030"
            ],
            "threshold": 0.9
        },
        "id": "CVE-2026-12817-f0060b57",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/bcgit/bc-java/commit/4b712819846ec944379f4909101abac20f0ad4b0",
        "target": {
            "file": "pg/src/main/java/org/bouncycastle/openpgp/operator/bc/BcAEADUtil.java"
        }
    },
    {
        "deprecated": false,
        "digest": {
            "function_hash": "29954275655684992565967407666109330429",
            "length": 114
        },
        "id": "CVE-2026-12817-f9147b41",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/bcgit/bc-java/commit/4b712819846ec944379f4909101abac20f0ad4b0",
        "target": {
            "file": "pg/src/test/java/org/bouncycastle/openpgp/test/PGPAeadTest.java",
            "function": "performTest"
        }
    }
]
vanir_signatures_modified 
"2026-10-16T09:47:54Z"