# Rustls Webpki vulnerabilities

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

Junglewise Threat Intelligence has tracked 4 vulnerabilities in Rustls Webpki: 0 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-2026-93602, was published on 18 September 2026. Nothing in the last four weeks, down from 4 vulnerabilities in the four before.

## Counts

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

## About Rustls Webpki

Rust library implementing X.509 public key infrastructure certificate validation.

## Latest Rustls Webpki vulnerabilities

- [CVE-2026-93602: rustls-webpki CRL distribution point matching bypass](https://junglewise.ai/threats/cve-2026-93602-rustls-webpki-crl-distribution-point-matching-bypass) (medium, CVSS 4.4, published 18 Sep 2026)
- [CVE-2026-93601: rustls-webpki name constraint bypass for wildcard certificates](https://junglewise.ai/threats/cve-2026-93601-rustls-webpki-name-constraint-bypass-for-wildcard-certificates) (low, CVSS 3.1, published 18 Sep 2026)
- [CVE-2026-93600: rustls-webpki X.509 name constraint bypass for URI names](https://junglewise.ai/threats/cve-2026-93600-rustls-webpki-x-509-name-constraint-bypass-for-uri-names) (low, CVSS 3.1, published 18 Sep 2026)
- [CVE-2026-93599: rustls-webpki integer underflow in BIT STRING parsing](https://junglewise.ai/threats/cve-2026-93599-rustls-webpki-integer-underflow-in-bit-string-parsing) (high, CVSS 7.5, published 18 Sep 2026)

## Most severe Rustls Webpki vulnerabilities

- [CVE-2026-93599: rustls-webpki integer underflow in BIT STRING parsing](https://junglewise.ai/threats/cve-2026-93599-rustls-webpki-integer-underflow-in-bit-string-parsing) (high, CVSS 7.5, published 18 Sep 2026)
- [CVE-2026-93602: rustls-webpki CRL distribution point matching bypass](https://junglewise.ai/threats/cve-2026-93602-rustls-webpki-crl-distribution-point-matching-bypass) (medium, CVSS 4.4, published 18 Sep 2026)
- [CVE-2026-93601: rustls-webpki name constraint bypass for wildcard certificates](https://junglewise.ai/threats/cve-2026-93601-rustls-webpki-name-constraint-bypass-for-wildcard-certificates) (low, CVSS 3.1, published 18 Sep 2026)
- [CVE-2026-93600: rustls-webpki X.509 name constraint bypass for URI names](https://junglewise.ai/threats/cve-2026-93600-rustls-webpki-x-509-name-constraint-bypass-for-uri-names) (low, CVSS 3.1, published 18 Sep 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 4 vulnerabilities in the four before.

| 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 | 4 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Rustls technologies

- [Rustls](https://junglewise.ai/threats/technologies/rustls-rustls): 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 Webpki vulnerabilities", https://junglewise.ai/threats/technologies/webpki, 9 November 2026.