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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, 07:35 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 9.6 Extended Update Support. Users should apply the provided updates (resteasy-3.0.26-20.el9_6.2 and related packages) as detailed in the Red Hat advisory article https://access.redhat.com/articles/11258. Applying these updates will remediate the identified vulnerabilities. No additional mitigation steps are indicated by the vendor advisory.

Description

Two security vulnerabilities have been identified in RESTEasy, a JBoss project framework for building RESTful web services and Java applications. The first vulnerability (CVE-2026-89059) involves an unbounded image decode in IIOImageProvider that can lead to a decompression-bomb denial of service (DoS). The second vulnerability (CVE-2026-89058) involves 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 Red Hat Enterprise Linux 9.6 Extended Update Support. The update is rated as having an important security impact. No CVSS score is provided in the advisory. No known exploits in the wild have been reported.

References

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