CVE-2026-27606

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 1.5%, top 28% 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
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

Rollup is a module bundler for JavaScript. Versions prior to 2.80.0, 3.30.0, and 4.59.0 of the Rollup module bundler (specifically v4.x and present in current source) is vulnerable to an Arbitrary File Write via Path Traversal. Insecure file name sanitization in the core engine allows an attacker to control output filenames (e.g., via CLI named inputs, manual chunk aliases, or malicious plugins) and use traversal sequences (../) to overwrite files anywhere on the host filesystem that the build process has permissions for. This can lead to persistent Remote Code Execution (RCE) by overwriting critical system or user configuration files. Versions 2.80.0, 3.30.0, and 4.59.0 contain a patch for the issue.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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
Severity98% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
72%
KEV
Not listed

Published

February 25, 2026

Last Modified

September 10, 2026

Advisory Details (9)

Auto-updated Sep 17, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github, redhat.
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:13512
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:13508
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:10175
github Patch Available🟡 PoC Available

Arbitrary File Write via Path Traversal in Rollup 4 · Advisory · rollup/rollup · GitHub

https://github.com/rollup/rollup/security/advisories/GHSA-mw96-cpmx-2vgc
github_release Patch Available

v4.59.0

Patch available: rollup/rollup v4.59.0

https://github.com/rollup/rollup/releases/tag/v4.59.0
github_release Patch Available

v3.30.0

Patch available: rollup/rollup v3.30.0

https://github.com/rollup/rollup/releases/tag/v3.30.0
github_commit

commit d6dee5e99bb8 (rollup/rollup)

Fix landed in rollup/rollup commit d6dee5e99bb8 — awaiting tagged release

https://github.com/rollup/rollup/commit/d6dee5e99bb82aac0bee1df4ab9efbde455452c3
github_commit Patch Available

commit c8cf1f9c48c5 (rollup/rollup)

Patch available: rollup/rollup v3.30.0 (contains commit c8cf1f9c48c5)

https://github.com/rollup/rollup/commit/c8cf1f9c48c516285758c1e11f08a54f304fd44e
github_commit Patch Available

commit c60770d7aaf7 (rollup/rollup)

Patch available: rollup/rollup v4.59.0 (contains commit c60770d7aaf7)

https://github.com/rollup/rollup/commit/c60770d7aaf750e512c1b2774989ea4596e660b2

Vendor Advisories for CVE-2026-27606(10)

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

Patch Availability(10)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatautomation-gateway-0:2.5.20260422-2.el9ap2026-05-04redhat
redhatautomation-platform-ui-0:2.6.8-1.el9ap2026-05-04redhat
redhatansible-automation-platform-26/gateway-rhel9:17773111202026-05-04redhat
redhatdevspaces/traefik-rhel9:17767185852026-04-23redhat
redhatopenshift-service-mesh/kiali-rhel8:17761913022026-04-16redhat
redhatrhdh/rhdh-hub-rhel9:17751406472026-04-07redhat
redhatrhdh/rhdh-hub-rhel9:17745456052026-03-30redhat
redhatquay/quay-rhel8:17739710772026-03-24redhat
redhatrhtas/rhtas-console-ui-rhel9:17739347942026-03-24redhat
redhatopenshift-service-mesh/kiali-rhel8:17730599172026-03-19redhat

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

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
node-rollup2.38.4-1 ... 3.7.5-1 (58 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
node-rollup3.15.0-1 ... 3.30.0-6 (17 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
node-rollup3.29.5-1 ... 3.30.0-6 (9 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
node-rollup3.29.5-1, 3.29.5-2, 3.29.5-33.30.0-1—
npm(1)
PackageVulnerable rangeFixed inDependents
rollup—4.59.0—

Weakness Classification(1)

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

Data Freshness Timeline

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

Frequently asked(5)

What is CVE-2026-27606?
CVE-2026-27606 is a critical vulnerability published on February 25, 2026. Rollup is a module bundler for JavaScript. Versions prior to 2.80.0, 3.30.0, and 4.59.0 of the Rollup module bundler (specifically v4.x and present in current source) is vulnerable to an Arbitrary File Write via Path Traversal. Insecure file name sanitization in the core engine allows an attacker…
When was CVE-2026-27606 disclosed?
CVE-2026-27606 was first published in the National Vulnerability Database on February 25, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27606 actively exploited?
CVE-2026-27606 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 27.7% of all scored CVEs.
What is the CVSS score of CVE-2026-27606?
CVE-2026-27606 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-27606?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27606, 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.

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