rustls webpki Name Constraints URI Validation Bypass
CVSS score
2.1
EPSS probability
%0.2
Risk score
0.0
Published
24 d ago
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Vulnerability description
DayBreach CVE AI Research
CVE-2026-93600 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.
rustls-webpki (rustls/webpki) versions 0.101.0 through 0.103.11 and 0.104.0-alpha releases before 0.104.0-alpha.6 ignore X.509 name constraints that apply to URI names, causing such constraints to be accepted rather than enforced. Because name constraints are restrictions on otherwise properly issued certificates, the flaw is only reachable after successful signature verification and requires a misissued certificate to exploit; the library also provides no API for asserting URI names, and URI name constraints are otherwise unimplemented. Versions 0.103.12 and 0.104.0-alpha.6 reject URI name constraints unconditionally.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-93600 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | rustls | webpki | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 2.2 | CVSS V31 | LOW | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N | NVD |
| 2.2 | CVSS V3_1 | LOW | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N | CVE CNA |
| 2.1 | CVSS V40 | LOW | CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X | NVD |
| 2.1 | CVSS V4_0 | LOW | CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | CVE CNA |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-93600 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-93600 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
rustls-webpki before 0.103.13 Panic via empty BIT STRING
rustls-webpki before 0.103.10 CRL Revocation Check Bypass
rustls webpki 0.101.0 before 0.103.12 Name Constraint Bypass
Get this vulnerability through the API
Affected products, version ranges, exploitation status and patch information in a single request, with a free key.
curl -H "x-api-key: $DAYBREACH_API_KEY" \ "https://api.enginteksut.com.tr/api/v1/intel/cves/CVE-2026-93600"