CVE-2026-31802

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 83% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: Elevated riskExposed: 0

A fix is available — apply it.

node-tar is a full-featured Tar for Node.js. Prior to version 7.5.11, tar (npm) can be tricked into creating a symlink that points outside the extraction directory by using a drive-relative symlink target such as C:../../../target.txt, which enables file overwrite outside cwd during normal tar.x() extraction. This vulnerability is fixed in 7.5.11.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity55% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

March 9, 2026

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Aug 4, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

Symlink Path Traversal via Drive-Relative Linkpath · Advisory · isaacs/node-tar · GitHub

https://github.com/isaacs/node-tar/security/advisories/GHSA-9ppj-qmqm-q256
github_commit

commit f48b5fa3b798 (isaacs/node-tar)

Fix landed in isaacs/node-tar commit f48b5fa3b798 — awaiting tagged release

https://github.com/isaacs/node-tar/commit/f48b5fa3b7985ddab96dc0f2125a4ffc9911b6ad

Vendor Advisories for CVE-2026-31802(2)

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
redhatdevspaces/dashboard-rhel9:17793412892026-05-28redhat

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

(3 across 3 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
node-tar6.0.5+ds1+~cs11.3.9-1, 6.0.5+ds1+~cs11.3.9-1+deb11u1, 6.0.5+ds1+~cs11.3.9-1+deb11u26.0.5+ds1+~cs11.3.9-1+deb11u3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
node-tar6.2.1+ds1+~cs6.1.13-1 ... 6.2.1+~cs7.0.8-1 (10 versions)6.2.1+ds1+~cs6.1.13-10—
npm(1)
PackageVulnerable rangeFixed inDependents
tar—7.5.11—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 30× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-17 19:30 UTCEPSS rescore
  4. 2026-09-16 14:08 UTCEPSS rescore
  5. 2026-09-16 05:15 UTCEPSS rescore
  6. 2026-09-13 16:47 UTCEPSS rescore
  7. 2026-09-12 15:01 UTCEPSS rescore
  8. 2026-09-11 14:52 UTCEPSS rescore
  9. 2026-09-10 09:34 UTCEPSS rescore
  10. 2026-09-08 22:00 UTCEPSS rescore
  11. 2026-09-07 16:01 UTCEPSS rescore
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-04 05:06 UTCEPSS rescore
  15. 2026-09-02 22:40 UTCOSV refresh
  16. 2026-09-02 14:11 UTCEPSS rescore
  17. 2026-09-01 13:53 UTCEPSS rescore
  18. 2026-09-01 04:39 UTCEPSS rescore
  19. 2026-09-01 04:39 UTCEPSS rescore
  20. 2026-08-30 19:17 UTCEPSS rescore
  21. 2026-08-30 01:22 UTCEPSS rescore
  22. 2026-08-28 21:41 UTCEPSS rescore
  23. 2026-08-27 14:25 UTCEPSS rescore
  24. 2026-08-26 14:46 UTCEPSS rescore
  25. 2026-08-25 13:49 UTCEPSS rescore
Show 49 more
  1. 2026-08-24 14:17 UTCEPSS rescore
  2. 2026-08-23 00:19 UTCEPSS rescore
  3. 2026-08-21 23:49 UTCEPSS rescore
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-19 17:03 UTCEPSS rescore
  7. 2026-08-18 13:48 UTCEPSS rescore
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-16 14:56 UTCEPSS rescore
  10. 2026-08-16 12:10 UTCEG score recompute
  11. 2026-08-16 12:10 UTCVendor advisory
  12. 2026-08-16 02:14 UTCEPSS rescore
  13. 2026-08-15 01:30 UTCEPSS rescore
  14. 2026-08-14 08:06 UTCEG score recompute
  15. 2026-08-14 08:06 UTCVendor advisory
  16. 2026-08-13 22:00 UTCEPSS rescore
  17. 2026-08-12 23:31 UTCEG score recompute
  18. 2026-08-12 23:31 UTCVendor advisory
  19. 2026-08-12 13:50 UTCEPSS rescore
  20. 2026-08-11 05:42 UTCEG score recompute
  21. 2026-08-11 05:42 UTCVendor advisory
  22. 2026-08-11 00:00 UTCEPSS rescore
  23. 2026-08-10 06:53 UTCEG score recompute
  24. 2026-08-10 06:53 UTCVendor advisory
  25. 2026-08-09 13:46 UTCEPSS rescore
  26. 2026-08-09 07:46 UTCEG score recompute
  27. 2026-08-09 07:46 UTCVendor advisory
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-07 19:08 UTCEG score recompute
  30. 2026-08-07 19:08 UTCVendor advisory
  31. 2026-08-06 13:46 UTCEPSS rescore
  32. 2026-08-06 02:15 UTCEG score recompute
  33. 2026-08-06 02:15 UTCVendor advisory
  34. 2026-08-05 19:17 UTCEPSS rescore
  35. 2026-08-04 15:10 UTCEPSS rescore
  36. 2026-08-04 10:38 UTCEPSS rescore
  37. 2026-08-04 01:40 UTCEG score recompute
  38. 2026-08-04 01:40 UTCVendor advisory
  39. 2026-08-03 10:36 UTCEPSS rescore
  40. 2026-08-02 17:59 UTCEG score recompute▼ 2.70
  41. 2026-08-02 17:59 UTCVendor advisory
  42. 2026-08-02 02:27 UTCEPSS rescore
  43. 2026-08-01 04:16 UTCEPSS rescore
  44. 2026-07-30 16:28 UTCEPSS rescore
  45. 2026-07-30 01:30 UTCEPSS rescore
  46. 2026-07-28 15:36 UTCEPSS rescore
  47. 2026-07-27 12:54 UTCEG score recompute
  48. 2026-07-27 12:54 UTCVendor advisory
  49. 2026-07-27 12:50 UTCOSV refresh

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-31802?
CVE-2026-31802 is a medium vulnerability published on March 9, 2026. node-tar is a full-featured Tar for Node.js. Prior to version 7.5.11, tar (npm) can be tricked into creating a symlink that points outside the extraction directory by using a drive-relative symlink target such as C:../../../target.txt, which enables file overwrite outside cwd during normal tar.x()…
When was CVE-2026-31802 disclosed?
CVE-2026-31802 was first published in the National Vulnerability Database on March 9, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31802 actively exploited?
CVE-2026-31802 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 82.9% of all scored CVEs.
What is the CVSS score of CVE-2026-31802?
CVE-2026-31802 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-31802?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31802, 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-2026-31802

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