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TI-2020-18654 Aliases CVE-2020-36403GHSA-9cpm-77gg-x323

HTSlib through 1.10.2 allows out-of-bounds write access in vcf_parse_format (called from vcf_parse and vcf_read).

Priority MEDIUM 41CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

HTSlib through 1.10.2 allows out-of-bounds write access in vcf_parse_format (called from vcf_parse and vcf_read).

Why it matters now

EPSS 0.01593 75th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:htslib:htslib:*:*:*:*:*:*:*:*up to 1.10.2VulnerableHtslib
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*not specified by NVDRunning onLinux
  • cpe:2.3:a:htslib:htslib:*:*:*:*:*:*:*:* Versions up to 1.10.2 Vulnerable ·Htslib
  • cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Linux

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-36403
  2. 2026-10-03 Alias added: GHSA-9cpm-77gg-x323

References

Exploit 2

Patch 1

Advisory 1

  • TI-2017-14524 samtools htslib library version 1.4.0 and earlier is vulnerable to buffer overflow in the… CVSS 3.0CRITICAL 9.8
  • TI-2018-10042 An issue has been found in HTSlib 1.8. CVSS 3.0CRITICAL 9.8
  • TI-2026-24512 HTSlib CRAM decoder vulnerable to buffer overflow CVSS 4.0HIGH 8.8
  • TI-2026-24507 HTSlib CRAM reader has heap buffer overflow due to improper validation of input CVSS 4.0HIGH 8.8
  • TI-2026-24506 HTSlib CRAM reader has heap buffer overflow due to improper validation of input CVSS 4.0HIGH 8.8
  • TI-2026-24511 HTSlib CRAM reader has out-of-bounds read due to improper validation of input CVSS 4.0MEDIUM 6.9
See all 15 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences