CVE-2026-67550

MEDIUMPre-NVD 5.75.7—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (4th percentile of EPSS-scored CVEs). 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
Elevated
5.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.7Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

re2 provides Node.js bindings for Google's RE2 regular expression engine. Prior to 1.25.2, re2 validates lastIndex against the UTF-8 byte length of a subject but uses it as a UTF-16 code-unit offset in exec, test, match, replace, and split, allowing an attacker-influenced lastIndex on a non-ASCII subject to trigger an out-of-bounds heap read and an uncatchable process crash, with limited heap information disclosure in some cases. This issue is fixed in 1.25.2.

CVSS v3
5.7
EG Score
5.7MEDIUMmedium confidence
EG Risk
42
EG Risk 42/100CISA SSVC

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
Severity57% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
4th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 30, 2026

Last Modified

September 10, 2026

Advisory Details (3)

Auto-updated Jul 30, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

Release 1.25.2

Patch available: uhop/node-re2 1.25.2

https://github.com/uhop/node-re2/releases/tag/1.25.2
github_commit

commit 56293de4fc09 (uhop/node-re2)

Fix landed in uhop/node-re2 commit 56293de4fc09 — awaiting tagged release

https://github.com/uhop/node-re2/commit/56293de4fc0914d7bc35f92e98de25b0d9bb417d
github Patch Available🟡 PoC Available

Out-of-bounds heap read in `exec`/`test`/`match` via attacker-influenced `lastIndex` on a non-ASCII subject → uncatchable process crash (DoS) · Advisory · uhop/node-re2 · GitHub

Affected: 1.25.1. This

https://github.com/uhop/node-re2/security/advisories/GHSA-ff84-5f28-78qj

Vendor Advisories for CVE-2026-67550(1)

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

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
node-re21.15.9+~cs1.8.18-1 ... 1.25.0+~cs1.6.0-2 (21 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
node-re21.18.0+~cs2.13.8-1 ... 1.26.1+~cs1.8.0-1 (12 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
node-re21.21.4+~cs2.13.13-2 ... 1.26.1+~cs1.8.0-1 (7 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
node-re21.21.4+~cs2.13.13-2, 1.22.1+~cs1.3.5-1, 1.23.3+~cs1.3.5-1, 1.25.0+~cs1.6.0-1, 1.25.0+~cs1.6.0-2
  • every version up to 1.26.1+~cs1.7.0-1: fixed in 1.26.1+~cs1.7.0-1
—
npm(1)
PackageVulnerable rangeFix by version rangeDependents
re2—
  • every version up to 1.25.2: fixed in 1.25.2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 40× 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. 2026-10-04 23:22 UTCEPSS rescore
  2. 2026-10-04 06:36 UTCEG score recompute
  3. 2026-10-03 14:26 UTCEPSS rescore
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  6. 2026-10-01 19:50 UTCEPSS rescore
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  8. 2026-09-30 15:03 UTCEPSS rescore
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  10. 2026-09-28 13:52 UTCEPSS rescore
  11. 2026-09-27 18:58 UTCEG score recompute
  12. 2026-09-27 13:48 UTCEPSS rescore
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  19. 2026-09-20 03:41 UTCEG score recompute
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  21. 2026-09-18 19:28 UTCEPSS rescore
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  24. 2026-09-16 14:08 UTCEPSS rescore
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  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-15 03:13 UTCEG score recompute
  3. 2026-09-13 18:46 UTCEG score recompute
  4. 2026-09-12 19:33 UTCEG score recompute
  5. 2026-09-11 20:25 UTCEG score recompute
  6. 2026-09-11 14:53 UTCEPSS rescore
  7. 2026-09-11 09:37 UTCEPSS rescore
  8. 2026-09-10 20:39 UTCEG score recompute
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  10. 2026-09-08 22:01 UTCEPSS rescore
  11. 2026-09-07 19:46 UTCEG score recompute
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  18. 2026-09-04 05:07 UTCEPSS rescore
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  20. 2026-09-01 22:39 UTCEG score recompute
  21. 2026-09-01 13:54 UTCEPSS rescore
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  23. 2026-08-30 21:37 UTCEG score recompute
  24. 2026-08-30 19:17 UTCEPSS rescore
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  26. 2026-08-28 21:42 UTCEPSS rescore
  27. 2026-08-27 23:45 UTCEG score recompute
  28. 2026-08-27 00:33 UTCEG score recompute
  29. 2026-08-26 14:47 UTCEPSS rescore
  30. 2026-08-25 02:16 UTCEG score recompute
  31. 2026-08-23 03:29 UTCEG score recompute
  32. 2026-08-23 00:19 UTCEPSS rescore
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  34. 2026-08-21 23:49 UTCEPSS rescore
  35. 2026-08-21 05:11 UTCEG score recompute
  36. 2026-08-20 22:56 UTCEPSS rescore
  37. 2026-08-20 06:03 UTCEG score recompute
  38. 2026-08-19 17:04 UTCEPSS rescore
  39. 2026-08-19 06:54 UTCEG score recompute
  40. 2026-08-18 13:48 UTCEPSS rescore
  41. 2026-08-18 07:46 UTCEG score recompute
  42. 2026-08-17 13:47 UTCEPSS rescore
  43. 2026-08-17 08:36 UTCEG score recompute
  44. 2026-08-16 14:56 UTCEPSS rescore
  45. 2026-08-16 09:28 UTCEG score recompute
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  47. 2026-08-15 01:30 UTCEPSS rescore
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  49. 2026-08-13 22:00 UTCEPSS rescore
  50. 2026-08-13 12:04 UTCEG score recompute
  51. 2026-08-12 13:51 UTCEPSS rescore
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  54. 2026-08-09 15:32 UTCEG score recompute
  55. 2026-08-09 13:47 UTCEPSS rescore
  56. 2026-08-08 16:37 UTCEPSS rescore
  57. 2026-08-06 18:08 UTCEG score recompute
  58. 2026-08-06 13:47 UTCEPSS rescore
  59. 2026-08-05 19:17 UTCEPSS rescore
  60. 2026-08-05 19:17 UTCEPSS rescore
  61. 2026-08-04 19:51 UTCEG score recompute
  62. 2026-08-04 15:10 UTCEPSS rescore
  63. 2026-08-04 10:39 UTCEPSS rescore
  64. 2026-08-03 20:43 UTCEG score recompute
  65. 2026-08-03 10:36 UTCEPSS rescore
  66. 2026-08-02 21:34 UTCEG score recompute
  67. 2026-08-02 02:27 UTCEPSS rescore
  68. 2026-08-01 22:26 UTCEG score recompute
  69. 2026-08-01 04:16 UTCEPSS rescore
  70. 2026-07-31 23:17 UTCEG score recompute
  71. 2026-07-30 20:32 UTCEG score recompute
  72. 2026-07-30 20:07 UTCEG score recompute
  73. 2026-07-30 20:05 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-67550?
CVE-2026-67550 is a medium vulnerability published on July 30, 2026. re2 provides Node.js bindings for Google's RE2 regular expression engine. Prior to 1.25.2, re2 validates lastIndex against the UTF-8 byte length of a subject but uses it as a UTF-16 code-unit offset in exec, test, match, replace, and split, allowing an attacker-influenced lastIndex on a non-ASCII…
When was CVE-2026-67550 disclosed?
CVE-2026-67550 was first published on July 30, 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-2026-67550 actively exploited?
CVE-2026-67550 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-67550?
CVE-2026-67550 has a CVSS base score of 5.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-67550?
A fix for CVE-2026-67550 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-67550 are linked in the Vendor Advisories panel on this page.

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