CVE-2016-1646

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-06-08), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 48%CVSS: 8.8Exploit: cisa kev · ssvc active · epss top5pctExposed: 0

A fix is available — apply it.

The Array.prototype.concat implementation in builtins.cc in Google V8, as used in Google Chrome before 49.0.2623.108, does not properly consider element data types, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via crafted JavaScript code.

CVSS v3
8.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: 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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
48%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

March 29, 2016

Last Modified

June 17, 2026

Advisory Details (4)

Auto-updated May 2, 2026
No patch confirmed yet.
generic

Issue 1804963002: [builtins] Fix Array.prototype.concat bug - Code Review

https://codereview.chromium.org/1804963002/
generic
https://code.google.com/p/chromium/issues/detail?id=594574
generic
http://rhn.redhat.com/errata/RHSA-2016-0525.html
generic

Chrome Releases: Stable Channel Update

http://googlechromereleases.blogspot.com/2016/03/stable-channel-update_24.html

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuoxideqt-codecs-extra (1.14.7-0ubuntu1) @ xenial2026-09-19ubuntu
redhatchromium-browser-0:49.0.2623.108-1.el62016-03-30redhat

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)
Debian:8(1)
PackageVulnerable rangeFixed inDependents
chromium-browser41.0.2272.118-1 ... 49.0.2623.87-1~deb8u1 (44 versions)49.0.2623.108-1~deb8u1—

Weakness Classification(2)

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

All Vendor Advisories

(2)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 102× in last 7d / 430× 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 1,589 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(6)

What is CVE-2016-1646?
CVE-2016-1646 is a critical vulnerability published on March 29, 2016. The Array.prototype.concat implementation in builtins.cc in Google V8, as used in Google Chrome before 49.0.2623.108, does not properly consider element data types, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via crafted…
When was CVE-2016-1646 disclosed?
CVE-2016-1646 was first published in the National Vulnerability Database on March 29, 2016, 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-2016-1646 actively exploited?
Yes. CISA added CVE-2016-1646 to the Known Exploited Vulnerabilities catalog on June 8, 2022, affecting Google Chromium V8. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2016-1646?
CVE-2016-1646 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2016-1646?
CVE-2016-1646 affects Google Chromium V8. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2016-1646?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2016-1646, 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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