CVE-2026-76845

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-08-24. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

adm-zip 0.5.9 through 0.6.0 follows symbolic links at the extraction destination. Utils.sanitize in util/utils.js enforces containment by comparing only the string form of an archive entry name against the resolved extraction root, and Utils.writeFileTo opens the computed destination with fs.openSync(path, "w", 0o666), which resolves symbolic links and carries neither O_NOFOLLOW nor a pre-write fs.lstatSync check. When a path component at the destination already exists as a symbolic link pointing outside the extraction root, extractAllTo, extractAllToAsync and extractEntryTo write the entry contents through that link and then chmod its target, placing attacker-controlled content in a file outside the root without any traversal sequence appearing in the archive. Reaching the write requires overwrite to be enabled, because the preceding fs.existsSync check also resolves the link and otherwise declines. An attacker able to create a symbolic link inside a shared, reused or predictable extraction directory, such as a temporary directory or a continuous integration workspace, can overwrite any file the extracting process is permitted to write.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 24, 2026

Last Modified

August 24, 2026

Advisory Details (3)

Auto-updated Aug 24, 2026
No patch confirmed yet.
generic

adm-zip 0.5.9 through 0.6.0 Arbitrary File Overwrite via Symlink Following on Extraction | Advisories | VulnCheck

https://www.vulncheck.com/advisories/adm-zip-through-arbitrary-file-overwrite-via-symlink-following-on-extraction
generic

adm-zip/util/utils.js at v0.6.0 · cthackers/adm-zip · GitHub

https://github.com/cthackers/adm-zip/blob/v0.6.0/util/utils.js
generic

GitHub - cthackers/adm-zip: A Javascript implementation of zip for nodejs. Allows user to create or extract zip files both in memory or to/from disk · GitHub

https://github.com/cthackers/adm-zip

Vendor Advisories for CVE-2026-76845(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
npmadm-zip—ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
adm-zip———

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 77× 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. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 08:49 UTCEG score recompute
  3. 2026-09-20 08:49 UTCGHSA enrichment
  4. 2026-09-19 10:08 UTCEG score recompute
  5. 2026-09-19 10:08 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 11:39 UTCEG score recompute
  8. 2026-09-18 11:39 UTCGHSA enrichment
  9. 2026-09-17 13:08 UTCGHSA enrichment
  10. 2026-09-16 14:16 UTCEG score recompute
  11. 2026-09-16 14:16 UTCGHSA enrichment
  12. 2026-09-16 14:08 UTCEPSS rescore
  13. 2026-09-16 05:15 UTCEPSS rescore
  14. 2026-09-15 15:19 UTCEG score recompute
  15. 2026-09-15 15:19 UTCGHSA enrichment
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 16:51 UTCGHSA enrichment
  18. 2026-09-13 18:24 UTCEG score recompute
  19. 2026-09-13 18:24 UTCGHSA enrichment
  20. 2026-09-12 19:57 UTCEG score recompute
  21. 2026-09-12 19:57 UTCGHSA enrichment
  22. 2026-09-12 15:02 UTCEPSS rescore
  23. 2026-09-11 21:30 UTCEG score recompute
  24. 2026-09-11 21:30 UTCGHSA enrichment
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 52 more
  1. 2026-09-10 23:02 UTCEG score recompute
  2. 2026-09-10 23:02 UTCGHSA enrichment
  3. 2026-09-10 09:35 UTCEPSS rescore
  4. 2026-09-10 00:34 UTCGHSA enrichment
  5. 2026-09-09 01:32 UTCEG score recompute
  6. 2026-09-09 01:32 UTCGHSA enrichment
  7. 2026-09-08 22:01 UTCEPSS rescore
  8. 2026-09-07 19:08 UTCEG score recompute
  9. 2026-09-07 19:08 UTCGHSA enrichment
  10. 2026-09-06 20:41 UTCEG score recompute
  11. 2026-09-06 20:41 UTCGHSA enrichment
  12. 2026-09-06 13:48 UTCEPSS rescore
  13. 2026-09-05 22:13 UTCEG score recompute
  14. 2026-09-05 22:13 UTCGHSA enrichment
  15. 2026-09-04 23:44 UTCEG score recompute
  16. 2026-09-04 23:44 UTCGHSA enrichment
  17. 2026-09-04 00:33 UTCGHSA enrichment
  18. 2026-09-03 02:05 UTCEG score recompute
  19. 2026-09-03 02:05 UTCGHSA enrichment
  20. 2026-09-02 14:12 UTCEPSS rescore
  21. 2026-09-02 03:34 UTCEG score recompute
  22. 2026-09-02 03:34 UTCGHSA enrichment
  23. 2026-09-01 13:54 UTCEPSS rescore
  24. 2026-09-01 05:04 UTCEG score recompute
  25. 2026-09-01 05:03 UTCGHSA enrichment
  26. 2026-09-01 04:40 UTCEPSS rescore
  27. 2026-09-01 04:40 UTCEPSS rescore
  28. 2026-08-31 06:33 UTCEG score recompute
  29. 2026-08-31 06:33 UTCGHSA enrichment
  30. 2026-08-30 19:18 UTCEPSS rescore
  31. 2026-08-30 19:17 UTCEPSS rescore
  32. 2026-08-30 08:06 UTCEG score recompute
  33. 2026-08-30 08:05 UTCGHSA enrichment
  34. 2026-08-30 01:22 UTCEPSS rescore
  35. 2026-08-29 09:37 UTCEG score recompute
  36. 2026-08-29 09:37 UTCGHSA enrichment
  37. 2026-08-28 21:42 UTCEPSS rescore
  38. 2026-08-28 11:09 UTCEG score recompute
  39. 2026-08-28 11:08 UTCGHSA enrichment
  40. 2026-08-27 14:25 UTCEPSS rescore
  41. 2026-08-27 12:41 UTCGHSA enrichment
  42. 2026-08-26 14:13 UTCGHSA enrichment
  43. 2026-08-25 15:46 UTCEG score recompute
  44. 2026-08-25 15:46 UTCGHSA enrichment
  45. 2026-08-25 13:49 UTCEPSS rescore
  46. 2026-08-24 17:19 UTCEG score recompute
  47. 2026-08-24 17:19 UTCGHSA enrichment
  48. 2026-08-24 16:34 UTCEG score recompute
  49. 2026-08-24 16:34 UTCGHSA enrichment
  50. 2026-08-24 14:24 UTCEG score recompute
  51. 2026-08-24 13:22 UTCEG score recompute
  52. 2026-08-24 13:22 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-76845?
CVE-2026-76845 is a medium vulnerability published on August 24, 2026. adm-zip 0.5.9 through 0.6.0 follows symbolic links at the extraction destination. Utils.sanitize in util/utils.js enforces containment by comparing only the string form of an archive entry name against the resolved extraction root, and Utils.writeFileTo opens the computed destination with…
When was CVE-2026-76845 disclosed?
CVE-2026-76845 was first published in the National Vulnerability Database on August 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76845 actively exploited?
CVE-2026-76845 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 96.9% of all scored CVEs.
What is the CVSS score of CVE-2026-76845?
CVE-2026-76845 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-76845?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-76845, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-76845

Explore →

Is Your Infrastructure Affected by CVE-2026-76845?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs