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CVE-2026-93599VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-93599· High 8.7

Not known to be exploited · CVSS 8.7 High : upgrade Red Hat webpki to 0.104.0-alpha.7 or 0.103.13 soon.

Data as of 29 Oct 2026, 12:49 UTC

CVSS 4.0 base score
8.7High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 0.104.0-alpha.7, 0.103.13
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade webpki and rustls/webpki to 0.104.0-alpha.7 or 0.103.13.

Affected software

ProductAffectedFixed in
rustlswebpkiAffected
  • >=0.104.0-alpha.1 <0.104.0-alpha.7
Fixed in
  • 0.104.0-alpha.7
rustlswebpkiAffected
  • <0.103.13
Fixed in
  • 0.103.13
crates.iorustls/webpkipkg:cargo/rustls/webpkiOther threatsAffected
  • <0.103.13
  • >=0.104.0-alpha.1 <0.104.0-alpha.7
Fixed in
  • 0.103.13
  • 0.104.0-alpha.7

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released updated packages netavark-2.1.0-1.hum1 and netavark-tests-2.1.0-1.hum1 for affected architectures. Users should apply these updates to mitigate the vulnerability. No alternative mitigations or workarounds are specified. Patch status is confirmed as fixed in these updated RPMs.

Description

A denial of service (DoS) vulnerability exists in rustls-webpki due to improper handling of a specially crafted Certificate Revocation List (CRL) containing an empty onlySomeReasons value in its issuingDistributionPoint extension. This flaw can cause applications that enable CRL revocation checking to panic and crash. The issue is tracked as CVE-2026-93599 and affects Red Hat Hardened Images RPMs, specifically the netavark package versions updated to 2.1.0-1.hum1. Red Hat has released an update to address this vulnerability.

References

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