The brace-expansion library generates arbitrary strings containing a common prefix and suffix. Prior to versions 5.0.5, 3.0.2, 2.0.3, and 1.1.13, a brace pattern with a zero step value (e.g., {1..2..0}) causes the sequence generation loop to run indefinitely, making the process hang for seconds and allocate heaps of memory. Versions 5.0.5, 3.0.2, 2.0.3, and 1.1.13 fix the issue. As a workaround, sanitize strings passed to expand() to ensure a step value of 0 is not used.
CVE-2026-33750
“—” beside the score: it is equal to NVD's CVSS score.
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.4% (38th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 6.5 is lower than this score; a lower GitHub score revises it only when its advisory is newer than the CVE record's last change, and this advisory (published 2026-03-26) is not newer than that change (2026-10-26), so it does not.
Also known asEUVD-2026-16620 (ENISA EUVD) · GHSA-f886-m6hf-6m8v (GitHub Security Advisories)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 34EG Risk 34/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.4% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.4%
- EPSS %ILE
- 38th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
March 27, 2026
Last Modified
October 26, 2026
Advisory Details (10)
Auto-updated Aug 2, 2026Zero-step sequence causes process hang and memory exhaustion · Advisory · juliangruber/brace-expansion · GitHub
https://github.com/juliangruber/brace-expansion/security/advisories/GHSA-f886-m6hf-6m8vBackport fix for GHSA-f886-m6hf-6m8v to v3
Fix merged in juliangruber/brace-expansion PR #97 on 2026-03-27 — awaiting tagged release
https://github.com/juliangruber/brace-expansion/pull/97Backport fix for GHSA-f886-m6hf-6m8v to v2
Patch available: juliangruber/brace-expansion v2.1.1 (PR #96 merged 2026-03-27)
https://github.com/juliangruber/brace-expansion/pull/96Backport fix for GHSA-f886-m6hf-6m8v to v1
Patch available: juliangruber/brace-expansion v1.1.15 (PR #95 merged 2026-03-27)
https://github.com/juliangruber/brace-expansion/pull/95Update affected versions for GHSA-f886-m6hf-6m8v (Patches backported to v1, v2, v3) · Issue #98 · juliangruber/brace-expansion · GitHub
https://github.com/juliangruber/brace-expansion/issues/98commit b9cacd9e55e7 (juliangruber/brace-expansion)
Fix landed in juliangruber/brace-expansion commit b9cacd9e55e7 — awaiting tagged release
https://github.com/juliangruber/brace-expansion/commit/b9cacd9e55e7a1fa588fe4b7bb1159d52f1d902acommit 7fd684f89fdd (juliangruber/brace-expansion)
Patch available: juliangruber/brace-expansion v1.1.15 (contains commit 7fd684f89fdd)
https://github.com/juliangruber/brace-expansion/commit/7fd684f89fdde3549563d0a6522226a9189472a2commit 311ac0d54994 (juliangruber/brace-expansion)
Patch available: juliangruber/brace-expansion v2.1.1 (contains commit 311ac0d54994)
https://github.com/juliangruber/brace-expansion/commit/311ac0d54994158c0a384e286a7d6cbb17ee8ed5brace-expansion/src/index.ts at daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a · juliangruber/brace-expansion · GitHub
https://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L184brace-expansion/src/index.ts at daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a · juliangruber/brace-expansion · GitHub
https://github.com/juliangruber/brace-expansion/blob/daa71bcb4a30a2df9bcb7f7b8daaf2ab30e5794a/src/index.ts#L107-L113Vendor Advisories for CVE-2026-33750(3)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:56928Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.22.2 security, enhancement & bug fix update
- RHSA-2026:56431Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.18.27 security, enhancement & bug fix update
- CVE-2026-33750Microsoft Security Response Center (MSRC)Medium
brace-expansion: Zero-step sequence causes process hang and memory exhaustion
Patch Availability(6)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | odf4/rook-ceph-rhel9-operator:1787061554 | 2026-08-19 | redhat |
| redhat | odf4/rook-ceph-rhel9-operator:1786706880 | 2026-08-18 | redhat |
| npm | brace-expansion @ 5.0.5 (fixes >= 4.0.0, < 5.0.5) | — | ghsa |
| npm | brace-expansion @ 3.0.2 (fixes >= 3.0.0, < 3.0.2) | — | ghsa |
| npm | brace-expansion @ 2.0.3 (fixes >= 2.0.0, < 2.0.3) | — | ghsa |
| npm | brace-expansion @ 1.1.13 (fixes < 1.1.13) | — | ghsa |
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)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-brace-expansion | 2.0.0-1 ... 2.0.3+~1.1.2-3 (8 versions) |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-brace-expansion | 2.0.1+~1.1.0-1 ... 2.1.4+~1.1.2-1 (7 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-brace-expansion | 2.0.1+~1.1.0-2, 2.0.3+~1.1.2-1, 2.0.3+~1.1.2-2, 2.0.3+~1.1.2-3, 2.1.4+~1.1.2-1 |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-brace-expansion | 2.0.1+~1.1.0-2 |
| — |
npm(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| brace-expansion | — |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 43× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 97 of 240 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 3 repeat rows among the latest 100 are merged into the row they repeat. The 143 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-11-01 07:53 UTCGHSA enrichmentGHSA-f886-m6hf-6m8v · GitHub severity MODERATE · GitHub CVSS 6.5
- 2026-11-01 07:53 UTCEG score recompute
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-26 22:26 UTCEG score recompute
- 2026-10-26 22:26 UTCVendor advisory
- 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 38th percentile
- 2026-10-25 14:34 UTCEG score recompute
- 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-18 03:46 UTCEG score recompute
- 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-17 15:43 UTCEG score recompute
- 2026-10-17 15:43 UTCVendor advisory
- 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.6% · 48th percentile
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- 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.6% · 48th percentile
- 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-12 16:13 UTCEG score recompute
- 2026-10-11 19:55 UTCEG score recompute
- 2026-10-11 17:08 UTCEG score recompute
- 2026-10-11 14:35 UTCEG score recompute
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-11 04:01 UTCOSV refresh
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-09-21 16:19 UTCOSV refresh
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-02 13:14 UTCOSV refresh
- 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-24 14:17 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 36th percentile
- 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-16 10:00 UTCEG score recompute
- 2026-08-16 10:00 UTCVendor advisory
- 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-14 19:13 UTCVendor advisory
- 2026-08-14 06:19 UTCEG score recompute
- 2026-08-14 06:19 UTCVendor advisory
- 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-12 20:37 UTCEG score recompute
- 2026-08-12 20:37 UTCVendor advisory
- 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.4% · 35th percentile
- 2026-08-11 20:45 UTCEG score recompute
- 2026-08-11 20:45 UTCVendor advisory
- 2026-08-11 03:48 UTCEG score recompute
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:11:node-brace-expansion · Debian:12:node-brace-expansion · npm:brace-expansion
Same vendor
10 shownredhat:RHSA-2026:56431
Frequently asked(5)
What is CVE-2026-33750?
When was the CVE record for CVE-2026-33750 published?
Is CVE-2026-33750 actively exploited?
What is the CVSS score of CVE-2026-33750?
How do I remediate CVE-2026-33750?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-33750
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