CVE-2026-13506

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Source
https://cve.org/CVERecord?id=CVE-2026-13506
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-13506.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-13506
Downstream
Related
Published
2026-08-03T02:56:49.476Z
Modified
2026-08-14T18:56:38.976197084Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/U:Amber CVSS Calculator
Summary
Lazy ASN.1 sequence forcing resets nesting-depth guard
Details

In Bouncy Castle for Java before 1.85, Lazy ASN.1 sequence forcing resets nesting-depth guard. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series).

Database specific 
{
    "cwe_ids": [
        "CWE-674"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/13xxx/CVE-2026-13506.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "1.0.0"
                },
                {
                    "fixed": "1.0.2.7"
                },
                {
                    "introduced": "2.0.0"
                },
                {
                    "fixed": "2.0.2"
                },
                {
                    "introduced": "2.1.0"
                },
                {
                    "fixed": "2.1.3"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "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
77454da9b3dcaaa2991412d1c3c1a6e1a338ff84
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.85"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}
Type
GIT
Repo
https://github.com/bcgit/bc-lts-java
Events
Introduced
468b5082f3f0971e80bf9edb7029c17b39b9ba0c
Fixed
f101b232c5d3e07ecdd504210a57e43831d6cd65
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "2.73.0"
        },
        {
            "fixed": "2.73.12"
        }
    ],
    "source": "AFFECTED_FIELD"
}

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 
[
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        "target": {
            "file": "core/src/main/java/org/bouncycastle/asn1/LazyEncodedSequence.java"
        },
        "deprecated": false,
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            "threshold": 0.9
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        "signature_version": "v1",
        "id": "CVE-2026-13506-0627e29f",
        "source": "https://github.com/bcgit/bc-java/commit/77454da9b3dcaaa2991412d1c3c1a6e1a338ff84",
        "signature_type": "Line"
    },
    {
        "target": {
            "file": "core/src/main/java/org/bouncycastle/asn1/LazyConstructionEnumeration.java"
        },
        "deprecated": false,
        "digest": {
            "line_hashes": [
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        "signature_version": "v1",
        "id": "CVE-2026-13506-22cdba6a",
        "source": "https://github.com/bcgit/bc-java/commit/77454da9b3dcaaa2991412d1c3c1a6e1a338ff84",
        "signature_type": "Line"
    },
    {
        "signature_version": "v1",
        "target": {
            "file": "core/src/test/java/org/bouncycastle/asn1/test/ASN1SequenceParserTest.java"
        },
        "deprecated": false,
        "digest": {
            "line_hashes": [
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        "source": "https://github.com/bcgit/bc-java/commit/77454da9b3dcaaa2991412d1c3c1a6e1a338ff84",
        "id": "CVE-2026-13506-30f877d6",
        "signature_type": "Line"
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    {
        "target": {
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            "function": "force"
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        "deprecated": false,
        "digest": {
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            "length": 298.0
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        "signature_version": "v1",
        "id": "CVE-2026-13506-45c6b2a0",
        "source": "https://github.com/bcgit/bc-java/commit/77454da9b3dcaaa2991412d1c3c1a6e1a338ff84",
        "signature_type": "Function"
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    {
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        "digest": {
            "function_hash": "164235855366415641138107437510214998227",
            "length": 91.0
        },
        "signature_version": "v1",
        "target": {
            "file": "core/src/main/java/org/bouncycastle/asn1/LazyConstructionEnumeration.java",
            "function": "LazyConstructionEnumeration"
        },
        "id": "CVE-2026-13506-77b5fd03",
        "source": "https://github.com/bcgit/bc-java/commit/77454da9b3dcaaa2991412d1c3c1a6e1a338ff84",
        "signature_type": "Function"
    },
    {
        "source": "https://github.com/bcgit/bc-java/commit/77454da9b3dcaaa2991412d1c3c1a6e1a338ff84",
        "target": {
            "file": "core/src/main/java/org/bouncycastle/asn1/ASN1InputStream.java",
            "function": "buildObject"
        },
        "deprecated": false,
        "digest": {
            "function_hash": "53992758034096463192460910559195542256",
            "length": 970.0
        },
        "id": "CVE-2026-13506-a14c7db2",
        "signature_version": "v1",
        "signature_type": "Function"
    },
    {
        "signature_version": "v1",
        "target": {
            "file": "core/src/main/java/org/bouncycastle/asn1/LazyEncodedSequence.java",
            "function": "getObjects"
        },
        "deprecated": false,
        "digest": {
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            "length": 132.0
        },
        "source": "https://github.com/bcgit/bc-java/commit/77454da9b3dcaaa2991412d1c3c1a6e1a338ff84",
        "id": "CVE-2026-13506-abb1df1f",
        "signature_type": "Function"
    },
    {
        "digest": {
            "line_hashes": [
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            "threshold": 0.9
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        "signature_version": "v1",
        "target": {
            "file": "core/src/main/java/org/bouncycastle/asn1/ASN1InputStream.java"
        },
        "deprecated": false,
        "id": "CVE-2026-13506-e28df0eb",
        "source": "https://github.com/bcgit/bc-java/commit/77454da9b3dcaaa2991412d1c3c1a6e1a338ff84",
        "signature_type": "Line"
    },
    {
        "target": {
            "file": "core/src/main/java/org/bouncycastle/asn1/LazyEncodedSequence.java",
            "function": "LazyEncodedSequence"
        },
        "deprecated": false,
        "digest": {
            "function_hash": "249944058971922663830407914701470125906",
            "length": 159.0
        },
        "signature_version": "v1",
        "id": "CVE-2026-13506-e8fcc6ed",
        "source": "https://github.com/bcgit/bc-java/commit/77454da9b3dcaaa2991412d1c3c1a6e1a338ff84",
        "signature_type": "Function"
    }
]
source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-13506.json"
vanir_signatures_modified 
"2026-08-12T15:33:34Z"