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Vulnerabilities

Vulnerability · CVE-2026-109088

A malicious X server could send malformed RECORD EnableContext reolies that can cause a X client using the parse_reply_call_callback function in libXtst before 1.2.6 to enter a end

Published Oct 27, 2026 · catalog updated Oct 28, 2026 · OpenBSD OpenBSD

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-109088. EPSS is 0.27%. Act only if a listed version of OpenBSD OpenBSD is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.27%
Remediation
Advisory link
Affected products
Alpine:v3.24 libxtst

A malicious X server could send malformed RECORD EnableContext reolies that can cause a X client using the parse_reply_call_callback function in libXtst before 1.2.6 to enter a endless loop.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • Alpine:v3.24 libxtst0 → 1.2.6-r0

How to fix CVE-2026-109088

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-109088. EPSS is 0.27%. Act only if a listed version of OpenBSD OpenBSD is installed.

Which versions are affected?

Compare what you have installed with 0 → 1.2.6-r0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.27%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 27, 2026 · Trivy Vulnerability DB

    Detected

    A malicious X server could send malformed RECORD EnableContext reolies that can cause a X client using the parse_reply_call_callback function in libXtst before 1.2.6 to enter a endless loop.

  2. Oct 28, 2026 · Trivy Vulnerability DB

    Fix available

    libxtst fixed in 1.2.6-r0

  3. Oct 28, 2026 · Trivy Vulnerability DB

    Fix available

    libxtst fixed in 1.2.6-r0

  4. Oct 28, 2026 · Trivy Vulnerability DB

    Updated

    A malicious X server could send malformed RECORD EnableContext reolies that can cause a X client using the parse_reply_call_callback function in libXtst before 1.2.6 to enter a endless loop.

Sources

  • CVE.orgVulnerability recordCVE-2026-109088

    Official CVE identifier

    cve.org
  • OpenBSD ErrataVendor advisoryCVE-2026-109088

    CVE-2026-109088 is named on the public OpenBSD Errata page.

    openbsd.org
  • OpenSSF OSV / OSV ScannerPackage advisoryALPINE-CVE-2026-109088
    osv.dev
  • Trivy Vulnerability DBPackage advisoryALPINE-CVE-2026-109088

    A malicious X server could send malformed RECORD EnableContext reolies that can cause a X client using the parse_reply_call_callback function in libXtst before 1.2.6 to enter a endless loop.

    osv.dev

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • OpenBSD ErrataNov 5, 2026
  • Trivy Vulnerability DBOct 31, 2026
  • OpenSSF OSV / OSV ScannerOct 29, 2026
  • CVE.orgOct 28, 2026