# Rustls vulnerabilities

Source: https://junglewise.ai/threats/technologies/rustls-rustls  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/rustls-rustls.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Rustls: 2 in the last 7 days and 4 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-123613, was published on 8 November 2026. 3 vulnerabilities in the last four weeks, up 200% on the four before (1).

## Counts

- Last 7 days: 2
- Last 30 days: 3
- Last 90 days: 4
- All time: 4 (0 critical, 0 exploited in the wild)

## About Rustls

Transport Layer Security library for Rust providing TLS/SSL cryptographic protocol implementation.

## Latest Rustls vulnerabilities

- [CVE-2026-123613: Rustls TLS 1.3 handshake message encryption level bypass](https://junglewise.ai/threats/cve-2026-123613-rustls-from-0-23-13-before-0-23-45-accepts-tls-1-3-handshake) (medium, CVSS 5.3, published 8 Nov 2026)
- [CVE-2026-123609: Rustls session Debug formatting exposes TLS secret keys](https://junglewise.ai/threats/cve-2026-123609-rustls-before-0-23-46-and-0-24-0-dev-1-before-0-24-0-dev-2) (medium, CVSS 4, published 8 Nov 2026)
- [Rustls client session debug formatting information disclosure](https://junglewise.ai/threats/rustls-session-debug-formatting-exposes-tls-master-secrets-and-6519d2da) (medium, CVSS 4, published 27 Oct 2026)
- [Rustls TLS 1.3 handshake message validation bypass across encryption levels](https://junglewise.ai/threats/rustls-tls-1-3-handshake-messages-incorrectly-accepted-across-4eccbdca) (medium, CVSS 5.3, published 5 Oct 2026)

## Most severe Rustls vulnerabilities

- [CVE-2026-123613: Rustls TLS 1.3 handshake message encryption level bypass](https://junglewise.ai/threats/cve-2026-123613-rustls-from-0-23-13-before-0-23-45-accepts-tls-1-3-handshake) (medium, CVSS 5.3, published 8 Nov 2026)
- [Rustls TLS 1.3 handshake message validation bypass across encryption levels](https://junglewise.ai/threats/rustls-tls-1-3-handshake-messages-incorrectly-accepted-across-4eccbdca) (medium, CVSS 5.3, published 5 Oct 2026)
- [CVE-2026-123609: Rustls session Debug formatting exposes TLS secret keys](https://junglewise.ai/threats/cve-2026-123609-rustls-before-0-23-46-and-0-24-0-dev-1-before-0-24-0-dev-2) (medium, CVSS 4, published 8 Nov 2026)
- [Rustls client session debug formatting information disclosure](https://junglewise.ai/threats/rustls-session-debug-formatting-exposes-tls-master-secrets-and-6519d2da) (medium, CVSS 4, published 27 Oct 2026)

## Vulnerabilities per week

3 vulnerabilities in the last four weeks, up 200% on the four before (1).

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 1 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 1 | 0 | 0 |
| 2 Nov 2026 | 2 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Rustls technologies

- [Rustls Webpki](https://junglewise.ai/threats/technologies/webpki): 4 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Rustls vulnerabilities", https://junglewise.ai/threats/technologies/rustls-rustls, 9 November 2026.