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Vulnerabilities

Vulnerability · CVE-2026-88807

libXrender RenderQueryPictFormats Reply Heap-based Buffer Overflow

Published Sep 21, 2026 · catalog updated Nov 1, 2026 · OpenBSD OpenBSD

Last checked Nov 5, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-88807. EPSS is 0.26%. 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
High8.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.26%
Remediation
Advisory link
Affected products
Debian:12 libxrender · Debian:13 libxrender · Debian:14 libxrender · vendor X.org libXrender

CVE-2026-88807 is listed by Red Hat Enterprise Linux (libXi, libXrender, ansible-collection-redhat-leapp) und Red Hat Build of Apache Camel for Quarkus: Mehrere Schwachstellen.

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.

  • Debian:12 libxrender1:0.9.10-1.1, 1:0.9.12-1, 1:0.9.13-1
  • Debian:13 libxrender1:0.9.12-1, 1:0.9.13-1
  • Debian:14 libxrender0 → 1:0.9.13-1
  • vendor X.org libXrenderversion unspecified

How to fix CVE-2026-88807

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-2026-88807. EPSS is 0.26%. Act only if a listed version of OpenBSD OpenBSD is installed.

Which versions are affected?

Compare what you have installed with 1:0.9.10-1.1, 1:0.9.12-1, 1:0.9.13-1, 1:0.9.12-1, 1:0.9.13-1, 0 → 1:0.9.13-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-122: Heap-based Buffer Overflow. EPSS 0.26%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Debian security

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. Sep 22, 2026 · CVE.org

    Updated

    A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.

  2. Oct 30, 2026 · BSI CERT-Bund

    Detected

    CVE-2026-88807 is listed by Red Hat Enterprise Linux (libXi, libXrender, ansible-collection-redhat-leapp) und Red Hat Build of Apache Camel for Quarkus: Mehrere Schwachstellen.

  3. Nov 1, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    libxrender fixed in 1:0.9.13-1

  4. Nov 1, 2026 · OpenSSF OSV / OSV Scanner

    Fix available

    libxrender fixed in 1:0.9.13-1

  5. Nov 1, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.

Sources

  • BSI CERT-BundGovernment advisoryCVE-2026-88807

    Red Hat Enterprise Linux (libXi, libXrender, ansible-collection-redhat-leapp) und Red Hat Build of Apache Camel for Quarkus: Mehrere Schwachstellen

    wid.cert-bund.de
  • CVE.orgVulnerability recordCVE-2026-88807

    A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.

    cve.org
  • OpenBSD ErrataVendor advisoryCVE-2026-88807

    CVE-2026-88807 is named on the public OpenBSD Errata page.

    openbsd.org
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-88807
    osv.dev

References

Freshness

Last verified in this catalog Nov 3, 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
  • OpenSSF OSV / OSV ScannerNov 1, 2026
  • CVE.orgOct 31, 2026
  • BSI CERT-BundOct 31, 2026