7.5

GHSA-FH2R-99Q2-6MMG: rustls-webpki Crates.Io

Published
AliasesRUSTSEC-2023-0053
Published 22-08-2023Last modified 04-02-2026

Vulnerability summary

GHSA-FH2R-99Q2-6MMG is a high (CVSS 7.5) vulnerability in rustls-webpki Crates.Io.

Priority
Prioritisesevere

Severe, CVSS 7.5 (OSV · Crates.io); no exploitation reported by the 5 checked sources; EPSS not yet published

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.0 (OSV · Crates.io), selected by version preference
EPSS scoreNot scoredRisk metrics not yet published.
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
CGA-CWF9-X8P4-2FXRCGA-XGMF-8VGJ-7MJ2CGA-CXHG-56P2-RHRQCVE-2018-16875

Timeline

  1. 22-08-2023
    PublishedVulnerability first disclosed.
  2. 04-02-2026
    Last modifiedVulnerability information updated.

Description

rustls-webpki: CPU denial of service in certificate path building When this crate is given a pathological certificate chain to validate, it will spend CPU time exponential with the number of candidate certificates at each step of path building. Both TLS clients and TLS servers that accept client certificate are affected. We now give each path building operation a budget of 100 signature verifications. The original `webpki` crate is also affected. This was previously reported in the original crate <https://github.com/briansmith/webpki/issues/69> and re-reported to us recently by Luke Malinowski.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Crates.Io1 product
  • rustls-webpki< 0.100.2 | ≥ 0.101.0, < 0.101.4

1 vendor · 1 product

References

6 links