Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-93602— rustls-webpki before 0.103.10 CRL Revocation Check Bypass

Quick assessment

Affected
rustls webpki
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 rustls-webpki 0.103.10 之前及 0.104.0-alpha.5 之前版本中，存在有缺陷的 CRL 颁发机构匹配逻辑：该逻辑仅将 CRL 的 IssuingDistributionPoint 与第一个 distributionPoint 进行比较，而忽略了额外的 distributionPoints。若攻击者拥有一个被攻陷的可信颁发机构，他们可以出示已被吊销但通过吊销检查（在 策略下）的证书，或在默认的拒绝策略下引发错误的错误信息。

CVSS 4.4 · Medium

Affected Version Matrix 2

VendorProduct Version RangeStatus
rustls webpki 0.102.0-alpha.0< 0.103.10 affected
0.104.0-alpha.1< 0.104.0-alpha.5 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-93602

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
rustls-webpki before 0.103.10 CRL Revocation Check Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
rustls-webpki versions before 0.103.10 and 0.104.0-alpha.5 contain faulty CRL authority-matching logic that compares only the first distributionPoint against each CRL's IssuingDistributionPoint, ignoring additional distributionPoints. Attackers with a compromised trusted issuing authority can present revoked certificates that pass revocation checks under UnknownStatusPolicy::Allow, or cause incorrect errors under the default deny policy.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
证书撤销验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
rustls webpki 0.102.0-alpha.0 ~ 0.103.10 -

II. Public POCs for CVE-2026-93602

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-93602

请登录查看更多情报信息。

Other References for CVE-2026-93602 (2)

Same Patch Batch · rustls · 2026-09-18 · 4 CVEs total

CVE-2026-93599 7.5 HIGH rustls-webpki before 0.103.13 Panic via empty BIT STRING
CVE-2026-93601 2.2 LOW rustls webpki 0.101.0 before 0.103.12 Name Constraint Bypass
CVE-2026-93600 2.2 LOW rustls webpki Name Constraints URI Validation Bypass

IV. Related Vulnerabilities

Same product: webpki
Same vendor: rustls
Same weakness: CWE-299

V. Comments for CVE-2026-93602

No comments yet

Leave a comment