# CVE-2026-13506: Lazy ASN.1 sequence forcing resets nesting-depth guard

> CVE-2026-13506: Lazy ASN.1 sequence forcing resets nesting-depth guard. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-13506
Last updated: 2026-08-28T16:41:22Z

- Published: 2026-08-03 02:56 UTC · Updated: 2026-08-28 16:41 UTC · Assigner: bcorg
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS: 0.49%, 42th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-674

## Description

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).

## Affected vendors and products

- Legion of the Bouncy Castle Inc.: BC-FJA
- Legion of the Bouncy Castle Inc.: BC-JAVA
- Legion of the Bouncy Castle Inc.: BC-LTS-JAVA

## Tracked companies

- [Confluence](https://rewindex.com/company/confluence.md)
- [Jira](https://rewindex.com/company/jira.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-13506)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-13506)
- [https://github.com/bcgit/bc-java/commit/77454da9b3dcaaa2991412d1c3c1a6e1a338ff84](https://github.com/bcgit/bc-java/commit/77454da9b3dcaaa2991412d1c3c1a6e1a338ff84)
- [https://github.com/bcgit/bc-java/wiki/CVE-2026-13506](https://github.com/bcgit/bc-java/wiki/CVE-2026-13506)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-13506 · Markdown: https://rewindex.com/cve/CVE-2026-13506.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-13506 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:34.246Z