CVE-2026-55698

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 77% 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, secondary
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm can persist package-manager bootstrap metadata in the first YAML document of pnpm-lock.yaml. Before the patch, direct pnpm execution trusted an already resolved packageManagerDependencies entry when the committed env lockfile contained matching pnpm and @pnpm/exe versions. A malicious repository could therefore commit package-manager lockfile package records and snapshots that bypassed fresh package-manager resolution, then cause pnpm to install and execute bytes selected by that committed lockfile state during automatic version switching. This vulnerability is fixed in 10.34.2 and 11.5.3.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
44
EG Risk 44/100

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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.3%
EPSS %ILE
20th
KEV
Not listed

Published

June 25, 2026

Last Modified

June 30, 2026

Advisory Details (1)

Auto-updated Jun 25, 2026
🔬 Proof of concept available. Patch available. Sources: github.
githubMentions a patch (unverified)🟡 PoC Available

CAND-PNPM-063: Project env lockfile can short-circuit package-manager resolution and execute lockfile-selected pnpm bytes · Advisory · pnpm/pnpm · GitHub

https://github.com/pnpm/pnpm/security/advisories/GHSA-w466-c33r-3gjp

Vendor Advisories for CVE-2026-55698(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
pnpm—
  • every version up to 10.34.2: fixed in 10.34.2
  • 11.0.0 up to 11.5.3: fixed in 11.5.3
—

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 28× 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.

Showing the most recent 100 of 141 total refreshes for this CVE.

  1. 2026-10-09 20:07 UTCEPSS rescore
  2. 2026-10-08 17:12 UTCEPSS rescore
  3. 2026-10-07 23:48 UTCEPSS rescore
  4. 2026-10-06 15:18 UTCEPSS rescore
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  10. 2026-09-30 15:03 UTCEPSS rescore
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  17. 2026-09-23 08:30 UTCEG score recompute
  18. 2026-09-20 20:16 UTCEPSS rescore
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  20. 2026-09-18 07:22 UTCEG score recompute
  21. 2026-09-17 19:31 UTCEPSS rescore
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  24. 2026-09-15 03:11 UTCEPSS rescore
  25. 2026-09-14 01:18 UTCEG score recompute
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  1. 2026-09-13 16:47 UTCEPSS rescore
  2. 2026-09-12 15:43 UTCEG score recompute
  3. 2026-09-11 14:53 UTCEPSS rescore
  4. 2026-09-10 09:35 UTCEPSS rescore
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-07 16:01 UTCEPSS rescore
  7. 2026-09-06 13:47 UTCEPSS rescore
  8. 2026-09-04 05:06 UTCEPSS rescore
  9. 2026-09-02 14:12 UTCEPSS rescore
  10. 2026-09-01 13:54 UTCEPSS rescore
  11. 2026-09-01 04:40 UTCEPSS rescore
  12. 2026-08-30 19:31 UTCEG score recompute
  13. 2026-08-30 19:17 UTCEPSS rescore
  14. 2026-08-30 01:22 UTCEPSS rescore
  15. 2026-08-28 21:41 UTCEPSS rescore
  16. 2026-08-27 23:18 UTCEG score recompute
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 14:46 UTCEPSS rescore
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-25 00:24 UTCEG score recompute
  21. 2026-08-24 13:09 UTCEG score recompute
  22. 2026-08-23 09:38 UTCEG score recompute
  23. 2026-08-23 00:19 UTCEPSS rescore
  24. 2026-08-22 10:12 UTCEG score recompute
  25. 2026-08-21 23:49 UTCEPSS rescore
  26. 2026-08-21 05:35 UTCEG score recompute
  27. 2026-08-20 22:55 UTCEPSS rescore
  28. 2026-08-20 07:02 UTCEG score recompute
  29. 2026-08-19 17:04 UTCEPSS rescore
  30. 2026-08-19 01:22 UTCEG score recompute
  31. 2026-08-18 13:48 UTCEPSS rescore
  32. 2026-08-17 13:47 UTCEPSS rescore
  33. 2026-08-16 15:03 UTCEG score recompute
  34. 2026-08-16 14:56 UTCEPSS rescore
  35. 2026-08-16 03:47 UTCEG score recompute
  36. 2026-08-16 02:14 UTCEPSS rescore
  37. 2026-08-15 05:15 UTCEG score recompute
  38. 2026-08-15 01:30 UTCEPSS rescore
  39. 2026-08-14 06:44 UTCEG score recompute
  40. 2026-08-13 22:00 UTCEPSS rescore
  41. 2026-08-12 20:49 UTCEG score recompute
  42. 2026-08-12 13:51 UTCEPSS rescore
  43. 2026-08-11 22:18 UTCEG score recompute
  44. 2026-08-11 11:02 UTCEG score recompute
  45. 2026-08-11 00:00 UTCEPSS rescore
  46. 2026-08-09 13:47 UTCEG score recompute
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  48. 2026-08-09 02:32 UTCEG score recompute
  49. 2026-08-08 16:37 UTCEPSS rescore
  50. 2026-08-07 16:45 UTCEG score recompute
  51. 2026-08-06 18:13 UTCEG score recompute
  52. 2026-08-06 13:47 UTCEPSS rescore
  53. 2026-08-05 19:41 UTCEG score recompute
  54. 2026-08-05 19:17 UTCEPSS rescore
  55. 2026-08-04 20:12 UTCEG score recompute
  56. 2026-08-04 15:10 UTCEPSS rescore
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  58. 2026-08-03 19:49 UTCEG score recompute
  59. 2026-08-03 10:36 UTCEPSS rescore
  60. 2026-08-02 09:53 UTCEG score recompute
  61. 2026-08-02 02:27 UTCEPSS rescore
  62. 2026-08-01 11:23 UTCEG score recompute
  63. 2026-08-01 04:16 UTCEPSS rescore
  64. 2026-07-31 01:19 UTCEG score recompute
  65. 2026-07-30 16:28 UTCEPSS rescore
  66. 2026-07-30 14:02 UTCEG score recompute
  67. 2026-07-30 01:30 UTCEPSS rescore
  68. 2026-07-28 21:07 UTCEG score recompute
  69. 2026-07-28 15:37 UTCEPSS rescore
  70. 2026-07-27 17:17 UTCEG score recompute
  71. 2026-07-26 14:57 UTCEG score recompute
  72. 2026-07-26 14:54 UTCEPSS rescore
  73. 2026-07-25 14:18 UTCEPSS rescore
  74. 2026-07-24 14:18 UTCEPSS rescore
  75. 2026-07-23 14:18 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-55698?
CVE-2026-55698 is a high vulnerability published on June 25, 2026. pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm can persist package-manager bootstrap metadata in the first YAML document of pnpm-lock.yaml. Before the patch, direct pnpm execution trusted an already resolved packageManagerDependencies entry when the committed env lockfile contained…
When was CVE-2026-55698 disclosed?
CVE-2026-55698 was first published on June 25, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55698 actively exploited?
CVE-2026-55698 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55698?
CVE-2026-55698 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55698?
A fix for CVE-2026-55698 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55698 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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