CVE-2026-56288

MEDIUMNVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-07-09. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 5 sources updated this week
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

GNU patch is vulnerable to a NULL pointer dereference when processing a specially crafted unified-diff patch file. Improper handling of consecutive end-of-file newline markers can corrupt internal hunk (single block of changes in diff) data structures, causing the application to pass a NULL pointer to fwrite() during patch processing. An attacker can trigger this condition with a malicious patch file, causing the utility to crash and resulting in a denial of service.

This issue has been fixed in the commit e6d6a4e021660679d7fc9150f981d4920f722313

CVSS v3
5.5
EG Score
5.5(high)
EPSS
1.8%
KEV
Not listed

Published

July 9, 2026

Last Modified

July 13, 2026

Advisory Details (2)

Auto-updated Jul 9, 2026
No patch confirmed yet.
generic

patch.git - GNU patch

https://cgit.git.savannah.gnu.org/cgit/patch.git/
generic

Vulnerabilities in GNU patch software | CERT Polska

https://cert.pl/en/posts/2026/07/CVE-2026-56288

Vendor Advisories for CVE-2026-56288(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 25× in last 7d / 25× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 16:57 UTCEPSS rescore
  3. 2026-07-15 02:56 UTCEG score recompute
  4. 2026-07-15 02:56 UTCGHSA enrichment
  5. 2026-07-15 02:00 UTCEPSS rescore
  6. 2026-07-15 02:00 UTCEPSS rescore
  7. 2026-07-14 04:13 UTCEG score recompute▲ 0.90
  8. 2026-07-14 04:13 UTCGHSA enrichment
  9. 2026-07-13 22:31 UTCEPSS rescore
  10. 2026-07-13 14:23 UTCNVD updateCVSS v3 → 5.5
  11. 2026-07-13 06:13 UTCEPSS rescore
  12. 2026-07-13 06:13 UTCEPSS rescore
  13. 2026-07-13 05:30 UTCEG score recompute
  14. 2026-07-13 05:30 UTCGHSA enrichment
  15. 2026-07-12 06:47 UTCEG score recompute
  16. 2026-07-12 06:47 UTCGHSA enrichment
  17. 2026-07-12 05:46 UTCEPSS rescore
  18. 2026-07-11 08:27 UTCEPSS rescore
  19. 2026-07-11 08:27 UTCEPSS rescore
  20. 2026-07-11 08:03 UTCEG score recompute
  21. 2026-07-11 08:03 UTCGHSA enrichment
  22. 2026-07-10 09:19 UTCEG score recompute
  23. 2026-07-10 09:19 UTCGHSA enrichment
  24. 2026-07-09 10:36 UTCEG score recompute
  25. 2026-07-09 10:35 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56288?
CVE-2026-56288 is a medium vulnerability published on July 9, 2026. GNU patch is vulnerable to a NULL pointer dereference when processing a specially crafted unified-diff patch file. Improper handling of consecutive end-of-file newline markers can corrupt internal hunk (single block of changes in diff) data structures, causing the application to pass a NULL pointer…
When was CVE-2026-56288 disclosed?
CVE-2026-56288 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56288 actively exploited?
CVE-2026-56288 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56288?
CVE-2026-56288 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-56288?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56288, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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