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CVE-2026-89058VulnerabilityPublished Updated

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 29 Oct 2026, 07:43 UTC

CVSS 3.1 base score
7.4High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 17% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
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 29 Oct 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 updated packages for RESTEasy in Red Hat Enterprise Linux 9 and its variants to address these vulnerabilities. Users should apply the security update as described in Red Hat Advisory RHSA-2026:85234 and the referenced article https://access.redhat.com/articles/11258 to remediate these issues. No alternative mitigations are specified; applying the official update is the recommended action.

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) concerns the CorsFilter reflecting arbitrary origins with credentials when configured with a wildcard, potentially allowing unauthorized cross-origin requests. Red Hat has issued a security advisory with updates to address these issues in Red Hat Enterprise Linux 9 and related variants.

References

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