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Vulnerabilities

Vulnerability · CVE-2026-109831

UnRTF by GNU Project is vulnerable to out-of-bounds write.

Published Oct 20, 2026 · catalog updated Oct 20, 2026 · JVN

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-2026-109831. EPSS is 0.21%. Act only if a listed version of JVN is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.21%
Remediation
Advisory link
Affected products
Debian:12 unrtf · Debian:13 unrtf · Debian:14 unrtf

UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.

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 unrtf0.21.10-clean-1, 0.21.10-clean-2, 0.21.13-1
  • Debian:13 unrtf0.21.10-clean-1, 0.21.10-clean-2, 0.21.13-1
  • Debian:14 unrtf0.21.10-clean-1, 0.21.10-clean-2, 0.21.13-1

How to fix CVE-2026-109831

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-2026-109831. EPSS is 0.21%. Act only if a listed version of JVN is installed.

Which versions are affected?

Compare what you have installed with 0.21.10-clean-1, 0.21.10-clean-2, 0.21.13-1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-787: Out-of-bounds Write. EPSS 0.21%. 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. Oct 20, 2026 · NIST NVD

    Detected

    UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.

  2. Oct 20, 2026 · OpenSSF OSV / OSV Scanner

    Updated

    UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.

  3. Oct 20, 2026 · NIST NVD

    Updated

    UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.

Sources

  • CVE.orgVulnerability recordCVE-2026-109831

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-109831

    30-day exploitation probability 0.21%

    first.org
  • Japan JVNGovernment advisoryCVE-2026-109831

    JVN#29783594: UnRTF vulnerable to out-of-bounds write

    jvn.jp
  • NIST NVDVulnerability recordCVE-2026-109831

    UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryDEBIAN-CVE-2026-109831
    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.

  • FIRST EPSSNov 6, 2026
  • Japan JVNOct 23, 2026
  • CVE.orgOct 21, 2026
  • NIST NVDOct 21, 2026
  • OpenSSF OSV / OSV ScannerOct 20, 2026