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CVE-2026-89058VulnerabilityPublished

Red Hat Security Advisory: resteasy security update

Affects Red Hat resteasySource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-89058· High 7.4

Not known to be exploited · CVSS 7.4 High : upgrade Red Hat RESTEasy to 7.0.5.Final or 6.2.19.Final soon.

Data as of 6 Nov 2026, 07:07 UTC

CVSS 3.1 base score
7.4High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.17.4
Patch
Available – fixed in 7.0.5.Final, 6.2.19.Final
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A: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 5 Nov 2026.

What to do

Upgrade RESTEasy to 7.0.5.Final or 6.2.19.Final.

Affected software

ProductAffectedFixed in
Red HatRESTEasyAffected
  • >=7.0.0.Alpha1 <7.0.5.Final
Fixed in
  • 7.0.5.Final
Red HatRESTEasyAffected
  • <6.2.19.Final
Fixed in
  • 6.2.19.Final
GitHubRESTEasypkg:github/RESTEasyOther threatsAffected
  • <6.2.19.Final
  • >=7.0.0.Alpha1 <7.0.5.Final
Fixed in
  • 6.2.19.Final
  • 7.0.5.Final

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 security updates for RESTEasy in Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions. Users should apply the provided updates to remediate these vulnerabilities. The advisory references updated packages (version 3.0.26-20.el9_4.2) that fix the issues. No additional mitigation steps are indicated beyond applying the official patches.

Description

Two security vulnerabilities have been identified in RESTEasy, a JBoss project framework for building RESTful Java applications. The first vulnerability (CVE-2026-89059) involves an unbounded image decode in the IIOImageProvider component, which can lead to a decompression bomb denial-of-service (DoS) attack. The second vulnerability (CVE-2026-89058) concerns the CorsFilter reflecting arbitrary origins with credentials when configured with a wildcard, potentially allowing unauthorized cross-origin requests. Red Hat has released security updates addressing these issues in their Enterprise Linux 9.4 Update Services for SAP Solutions. The update is rated as important by Red Hat Product Security. No public exploit code or in-the-wild exploitation has been reported at this time.

References

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