CVE-2026-56876

HIGHPre-NVD 8.18.1—
EchelonGraph scoreHIGH confidence

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-26. a secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.1Exploit: NoneExposed: 0

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

extract-zip does not validate symlink targets when extracting zip archives. When processing a malicious zip file containing a symlink with a relative path like '../../../../etc/passwd', extract-zip will extract the symlink without validation, allowing it to point outside the extraction directory. Depending on how extract-zip is used, an attacker could read or write to arbitrary files.

CVSS v3
8.1
EG Score
8.1(high)
EG Risk
—
EPSS
27.0%
KEV
Not listed

Published

June 26, 2026

Last Modified

July 6, 2026

Advisory Details (3)

Auto-updated Jun 26, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic
https://www.cve.org/CVERecord?id=CVE-2026-56876
generic
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-177-01.json
github Patch Available🟡 PoC Available

Path Traversal via Unvalidated Symlink in extract-zip · Advisory · ziad626/extract-zip-security-research · GitHub

https://github.com/ziad626/extract-zip-security-research/security/advisories/GHSA-x7jf-2287-qcpf

Vendor Advisories for CVE-2026-56876(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 80× 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. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:25 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 02:29 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
  8. 2026-07-17 01:25 UTCGHSA enrichment
  9. 2026-07-16 17:03 UTCEPSS rescore
  10. 2026-07-16 12:57 UTCGHSA enrichment
  11. 2026-07-16 00:31 UTCGHSA enrichment
  12. 2026-07-15 16:57 UTCEPSS rescore
  13. 2026-07-15 16:57 UTCEPSS rescore
  14. 2026-07-15 12:05 UTCGHSA enrichment
  15. 2026-07-15 02:00 UTCEPSS rescore
  16. 2026-07-15 02:00 UTCEPSS rescore
  17. 2026-07-14 23:36 UTCGHSA enrichment
  18. 2026-07-14 10:45 UTCGHSA enrichment
  19. 2026-07-13 22:31 UTCEPSS rescore
  20. 2026-07-13 22:07 UTCGHSA enrichment
  21. 2026-07-13 09:41 UTCGHSA enrichment
  22. 2026-07-13 06:13 UTCEPSS rescore
  23. 2026-07-13 06:13 UTCEPSS rescore
  24. 2026-07-12 21:14 UTCGHSA enrichment
  25. 2026-07-12 08:25 UTCGHSA enrichment
Show 55 more
  1. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-11 19:57 UTCGHSA enrichment
  3. 2026-07-11 08:27 UTCEPSS rescore
  4. 2026-07-11 08:27 UTCEPSS rescore
  5. 2026-07-11 07:30 UTCGHSA enrichment
  6. 2026-07-10 19:04 UTCGHSA enrichment
  7. 2026-07-10 06:38 UTCGHSA enrichment
  8. 2026-07-09 19:10 UTCEPSS rescore
  9. 2026-07-09 19:10 UTCEPSS rescore
  10. 2026-07-09 18:12 UTCGHSA enrichment
  11. 2026-07-09 05:46 UTCGHSA enrichment
  12. 2026-07-08 17:20 UTCGHSA enrichment
  13. 2026-07-08 15:16 UTCEPSS rescore
  14. 2026-07-08 15:16 UTCEPSS rescore
  15. 2026-07-08 04:53 UTCGHSA enrichment
  16. 2026-07-07 16:14 UTCGHSA enrichment
  17. 2026-07-07 13:46 UTCEPSS rescore
  18. 2026-07-07 13:46 UTCEPSS rescore
  19. 2026-07-07 03:47 UTCGHSA enrichment
  20. 2026-07-06 16:27 UTCEPSS rescore
  21. 2026-07-06 16:27 UTCEPSS rescore
  22. 2026-07-06 15:19 UTCGHSA enrichment
  23. 2026-07-06 02:48 UTCGHSA enrichment
  24. 2026-07-06 02:23 UTCEPSS rescore
  25. 2026-07-06 02:23 UTCEPSS rescore
  26. 2026-07-05 14:21 UTCGHSA enrichment
  27. 2026-07-05 02:31 UTCEPSS rescore
  28. 2026-07-05 02:30 UTCEPSS rescore
  29. 2026-07-05 01:55 UTCGHSA enrichment
  30. 2026-07-04 13:28 UTCGHSA enrichment
  31. 2026-07-04 06:31 UTCEPSS rescore
  32. 2026-07-04 06:31 UTCEPSS rescore
  33. 2026-07-04 01:02 UTCGHSA enrichment
  34. 2026-07-03 12:35 UTCGHSA enrichment
  35. 2026-07-02 23:57 UTCGHSA enrichment
  36. 2026-07-02 11:30 UTCGHSA enrichment
  37. 2026-07-01 23:03 UTCGHSA enrichment
  38. 2026-07-01 15:07 UTCEPSS rescore
  39. 2026-07-01 10:36 UTCGHSA enrichment
  40. 2026-06-30 23:22 UTCEPSS rescore
  41. 2026-06-30 22:09 UTCGHSA enrichment
  42. 2026-06-30 09:42 UTCGHSA enrichment
  43. 2026-06-29 21:16 UTCGHSA enrichment
  44. 2026-06-29 14:06 UTCEPSS rescore
  45. 2026-06-29 08:49 UTCGHSA enrichment
  46. 2026-06-28 20:23 UTCGHSA enrichment
  47. 2026-06-28 14:07 UTCEPSS rescore
  48. 2026-06-28 07:56 UTCGHSA enrichment
  49. 2026-06-28 04:56 UTCEPSS rescore
  50. 2026-06-28 04:56 UTCEPSS rescore
  51. 2026-06-27 19:31 UTCGHSA enrichment
  52. 2026-06-27 07:05 UTCGHSA enrichment
  53. 2026-06-26 21:42 UTCNVD updateCVSS v4 → 8.6
  54. 2026-06-26 18:39 UTCEG score recompute
  55. 2026-06-26 18:38 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-56876?
CVE-2026-56876 is a high vulnerability published on June 26, 2026. extract-zip does not validate symlink targets when extracting zip archives. When processing a malicious zip file containing a symlink with a relative path like '../../../../etc/passwd', extract-zip will extract the symlink without validation, allowing it to point outside the extraction directory.…
When was CVE-2026-56876 disclosed?
CVE-2026-56876 was first published in the National Vulnerability Database on June 26, 2026, with the most recent update on July 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-56876 actively exploited?
CVE-2026-56876 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 27.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-56876?
CVE-2026-56876 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-56876?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-56876, 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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