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CVE-2026-86983VulnerabilityPublished

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-86983· Medium

Not known to be exploited : upgrade Red Hat swift-crypto to 5.0.3 when convenient.

Data as of 3 Nov 2026, 04:45 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 5.0.3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 Oct 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 2 Nov 2026.

What to do

Upgrade swift-crypto and apple/swift-crypto to 5.0.3.

Affected software

ProductAffectedFixed in
Appleswift-cryptoAffected
  • <5.0.3
Fixed in
  • 5.0.3
SwiftURLapple/swift-cryptopkg:swift/apple/swift-cryptoOther threatsAffected
  • <5.0.3
Fixed in
  • 5.0.3

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

AI-suggested

Red Hat advises enforcing strict payload length limits and input validation at the application boundary before passing untrusted data to the P-384 VOPRF interface. If immediate code changes are not feasible, deploying an API gateway or reverse proxy to restrict maximum request body sizes is recommended. A security update including fixed RPMs (swift-lang-6.4.2-0.2.hum1 and swift-lang-runtime-6.4.2-0.2.hum1) is available and should be applied to remediate the issue.

Description

A denial of service vulnerability exists in the swift-crypto package's P-384 Verifiable Oblivious Pseudorandom Function (VOPRF) interface. A remote attacker can cause an application utilizing this interface to terminate unexpectedly by sending excessively long or unbounded input. This occurs because the interface does not enforce input length restrictions, leading to resource exhaustion and process termination.

References

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