# rustls-webpki (crates.io) vulnerabilities Source: https://junglewise.ai/threats/technologies/rustls-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/rustls-webpki.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 7 vulnerabilities in rustls-webpki (crates.io): 0 in the last 7 days and 5 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-111943, was published on 21 October 2026. 1 vulnerability in the last four weeks, down 75% on the four before (4). ## Counts - Last 7 days: 0 - Last 30 days: 1 - Last 90 days: 5 - All time: 7 (0 critical, 0 exploited in the wild) ## About rustls-webpki (crates.io) Rust library for validating X.509 certificates used in TLS connections. ## Latest rustls-webpki (crates.io) vulnerabilities - [CVE-2026-111943: Go crypto/x509 untrusted intermediate certificate validation](https://junglewise.ai/threats/cve-2026-111943-on-most-platforms-go-uses-the-given-system-root-certificates) (high, published 21 Oct 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) - [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) - [rustls-webpki: CPU denial of service in certificate path building](https://junglewise.ai/threats/rustls-webpki-cpu-denial-of-service-in-certificate-path-building-3f07ea21) (low, CVSS 3, published 22 Aug 2023) - [RUSTSEC-2023-0053 - rustls-webpki: CPU denial of service in certificate path building](https://junglewise.ai/threats/rustsec-2023-0053-rustls-webpki-cpu-denial-of-service-in-certificate-c7a3ea6b) (low, CVSS 3, published 22 Aug 2023) ## Most severe rustls-webpki (crates.io) 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-2026-111943: Go crypto/x509 untrusted intermediate certificate validation](https://junglewise.ai/threats/cve-2026-111943-on-most-platforms-go-uses-the-given-system-root-certificates) (high, published 21 Oct 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) - [rustls-webpki: CPU denial of service in certificate path building](https://junglewise.ai/threats/rustls-webpki-cpu-denial-of-service-in-certificate-path-building-3f07ea21) (low, CVSS 3, published 22 Aug 2023) - [RUSTSEC-2023-0053 - rustls-webpki: CPU denial of service in certificate path building](https://junglewise.ai/threats/rustsec-2023-0053-rustls-webpki-cpu-denial-of-service-in-certificate-c7a3ea6b) (low, CVSS 3, published 22 Aug 2023) ## Vulnerabilities per week 1 vulnerability in the last four weeks, down 75% on the four before (4). | 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 | 1 | 0 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 0 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## Other crates.io technologies - [surrealdb (crates.io)](https://junglewise.ai/threats/technologies/surrealdb): 83 vulnerabilities - [wasmtime (crates.io)](https://junglewise.ai/threats/technologies/wasmtime): 67 vulnerabilities - [deno (crates.io)](https://junglewise.ai/threats/technologies/deno): 39 vulnerabilities - [zebrad (crates.io)](https://junglewise.ai/threats/technologies/zebrad): 27 vulnerabilities - [russh (crates.io)](https://junglewise.ai/threats/technologies/crates-io-russh): 26 vulnerabilities - [openssl-src (crates.io)](https://junglewise.ai/threats/technologies/openssl-src): 26 vulnerabilities - [openssl (crates.io)](https://junglewise.ai/threats/technologies/crates-io-openssl): 25 vulnerabilities - [rustfs (crates.io)](https://junglewise.ai/threats/technologies/rustfs): 25 vulnerabilities - [coreutils (crates.io)](https://junglewise.ai/threats/technologies/crates-io-coreutils): 21 vulnerabilities - [ckb (crates.io)](https://junglewise.ai/threats/technologies/ckb): 19 vulnerabilities - [apollo-router (crates.io)](https://junglewise.ai/threats/technologies/apollo-router): 13 vulnerabilities - [deepseek-tui (crates.io)](https://junglewise.ai/threats/technologies/deepseek-tui): 13 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 (crates.io) vulnerabilities", https://junglewise.ai/threats/technologies/rustls-webpki, 9 November 2026.