CVE-2026-9277

HIGHPre-NVD 8.18.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 8.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.8% (56th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Trending — 3 sources updated this weekElevated
8.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 8.1Exploit: Public PoCExposed services: Not assessed

A fix is available — apply it.

shell-quote's quote() function did not validate object-token inputs against the operator model used by parse(). The .op field was backslash-escaped character by character using /(.)/g, which in JavaScript does not match line terminators (\n, \r, U+2028, U+2029). A line terminator in .op therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of { op: '...\n...' } from external input, and (2) via parse(cmd, envFn) when envFn returns object tokens whose .op is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: .op must match the parser's control-operator allowlist; { op: 'glob', pattern } validates pattern and forbids line terminators; { comment } validates comment and forbids line terminators; any other object shape throws TypeError.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
52
EG Risk 52/100

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 (value × EchelonGraph’s weight)
Severity81% × 45%
The EG Score, 8.1 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
0.8%
EPSS %ILE
56th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

May 22, 2026

Last Modified

September 14, 2026

Advisory Details (3)

Auto-updated Jun 3, 2026
Patch available. Sources: github.
GitHub advisoryMentions a patch (unverified)

shell-quote quote() does not escape newlines in object .op values · Advisory · ljharb/shell-quote · GitHub

https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p
Web page

oss-security - CVE-2026-9277: shell-quote before 1.8.4 command injection in quote()

http://www.openwall.com/lists/oss-security/2026/05/23/2
Web page

GitHub - ljharb/shell-quote · GitHub

https://github.com/ljharb/shell-quote

Vendor Advisories for CVE-2026-9277(20)

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

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatopenshift4/ose-console:17901027932026-10-01redhat
redhatquay/quay-rhel8:17885938432026-09-22redhat
redhatopenshift4/ose-console:17889006802026-09-17redhat
redhatopenshift4/ose-console:17882186692026-09-11redhat
redhatopenshift4/ose-console-rhel9:17876313822026-09-03redhat
redhatdevspaces/code-rhel9:17877627932026-09-01redhat
redhatopenshift4/ose-console:17870285592026-08-26redhat
redhatopenshift4/ose-console-rhel9:17870541592026-08-26redhat
redhatquay/quay-rhel9:17861819812026-08-12redhat
redhatopenshift4/ose-console-rhel9:17852785692026-08-05redhat
redhatansible-automation-platform/automation-portal:17858542262026-08-05redhat
redhatopenshift4/ose-agent-installer-ui-rhel9:17847246992026-07-28redhat
redhatopenshift4/ose-agent-installer-ui-rhel9:17847215812026-07-28redhat
redhatopenshift4/ose-agent-installer-ui-rhel9:17847137412026-07-28redhat
redhatopenshift4/ose-console-rhel9:17837181572026-07-22redhat
redhatquay/quay-rhel8:17843519662026-07-21redhat
redhatrhmtc/openshift-migration-ui-rhel8:17836905322026-07-20redhat
redhatquay/quay-rhel9:17839558462026-07-16redhat
redhatrhdh/rhdh-hub-rhel9:17834481842026-07-08redhat
redhatopenshift4/ose-console-rhel9:17829117112026-07-07redhat
redhatcluster-observability-operator/troubleshooting-panel-console-plugin-rhel9:17828394942026-07-01redhat
redhatquay/quay-rhel8:17824877172026-06-30redhat
redhatrhdh/rhdh-hub-rhel9:17827612442026-06-30redhat
redhatopenshift4/ose-console-rhel9:17822243902026-06-30redhat
redhatopenshift4/ose-console-rhel9:17823086752026-06-30redhat
redhatquay/quay-rhel8:17819373572026-06-25redhat
redhatdiscovery/discovery-ui-rhel9:17821669522026-06-24redhat
redhatquay/quay-rhel8:17818780702026-06-23redhat
redhatcryostat/cryostat-openshift-console-plugin-rhel9:4.2.0-102026-06-22redhat
redhatsatellite/iop-vulnerability-frontend-rhel9:17810324952026-06-16redhat

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

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
node-shell-quote1.7.4+~1.7.1-1
  • every version up to 1.7.4+~1.7.1-1+deb12u1: fixed in 1.7.4+~1.7.1-1+deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
node-shell-quote1.7.4+~1.7.1-1
  • every version up to 1.7.4+~1.7.1-1+deb13u1: fixed in 1.7.4+~1.7.1-1+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
node-shell-quote1.7.4+~1.7.1-1, 1.7.4+~1.7.1-2, 1.8.3+~1.7.5-1
  • every version up to 1.8.4+~1.7.5-1: fixed in 1.8.4+~1.7.5-1
—
npm(1)
PackageVulnerable rangeFix by version rangeDependents
shell-quote—
  • 1.1.0 up to 1.8.4: fixed in 1.8.4
—

Weakness Classification(2)

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

Additional Vendor Advisories

(16)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 33× 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 99 of 307 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 208 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  2. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  3. 2026-10-13 04:32 UTCEG score recompute
  4. 2026-10-13 04:32 UTCVendor advisory
  5. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  6. 2026-10-12 14:44 UTCEG score recompute
  7. 2026-10-11 19:13 UTCEG score recompute
  8. 2026-10-11 16:29 UTCEG score recompute
  9. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  10. 2026-10-11 13:43 UTCEG score recompute
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  12. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  13. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  15. 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  16. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  17. 2026-10-04 23:23 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  18. 2026-10-03 23:19 UTCOSV refresh
  19. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  20. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  21. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  22. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  23. 2026-09-28 13:52 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  24. 2026-09-27 13:49 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  25. 2026-09-26 15:59 UTCEPSS rescoreEPSS 1.0% · 59th percentile
Show 74 more
  1. 2026-09-24 14:04 UTCEPSS rescoreEPSS 1.0% · 59th percentile
  2. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  3. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  4. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  5. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  6. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  7. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  8. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  9. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  10. 2026-09-14 13:39 UTCEG score recompute
  11. 2026-09-14 13:39 UTCVendor advisory
  12. 2026-09-14 12:35 UTCEG score recompute
  13. 2026-09-14 12:35 UTCVendor advisory
  14. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  15. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  16. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  17. 2026-09-11 09:38 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  18. 2026-09-10 13:38 UTCEG score recompute
  19. 2026-09-10 13:38 UTCVendor advisory
  20. 2026-09-10 12:26 UTCEG score recompute
  21. 2026-09-10 12:26 UTCVendor advisory
  22. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  23. 2026-09-09 13:41 UTCEG score recompute
  24. 2026-09-09 13:41 UTCVendor advisory
  25. 2026-09-09 12:38 UTCEG score recompute
  26. 2026-09-09 12:38 UTCVendor advisory
  27. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  28. 2026-09-07 13:50 UTCEG score recompute
  29. 2026-09-07 13:50 UTCVendor advisory
  30. 2026-09-07 12:38 UTCEG score recompute
  31. 2026-09-07 12:38 UTCVendor advisory
  32. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  33. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  34. 2026-09-04 13:29 UTCEG score recompute
  35. 2026-09-04 13:29 UTCVendor advisory
  36. 2026-09-04 12:21 UTCEG score recompute
  37. 2026-09-04 12:21 UTCVendor advisory
  38. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  39. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  40. 2026-09-02 13:41 UTCEG score recompute
  41. 2026-09-02 13:41 UTCVendor advisory
  42. 2026-09-02 12:38 UTCEG score recompute
  43. 2026-09-02 12:38 UTCVendor advisory
  44. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  45. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  46. 2026-08-31 13:33 UTCEG score recompute
  47. 2026-08-31 13:33 UTCVendor advisory
  48. 2026-08-31 12:30 UTCEG score recompute
  49. 2026-08-31 12:30 UTCVendor advisory
  50. 2026-08-30 19:18 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  51. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  52. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  53. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  54. 2026-08-27 13:35 UTCEG score recompute
  55. 2026-08-27 13:35 UTCVendor advisory
  56. 2026-08-27 13:02 UTCEG score recompute
  57. 2026-08-27 13:02 UTCVendor advisory
  58. 2026-08-26 16:24 UTCEG score recompute
  59. 2026-08-26 16:24 UTCVendor advisory
  60. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  61. 2026-08-26 12:20 UTCEG score recompute
  62. 2026-08-26 12:20 UTCVendor advisory
  63. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  64. 2026-08-25 13:23 UTCEG score recompute
  65. 2026-08-25 13:23 UTCVendor advisory
  66. 2026-08-25 12:20 UTCEG score recompute
  67. 2026-08-25 12:20 UTCVendor advisory
  68. 2026-08-24 14:18 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  69. 2026-08-24 13:29 UTCEG score recompute
  70. 2026-08-24 13:29 UTCVendor advisory
  71. 2026-08-24 12:25 UTCEG score recompute
  72. 2026-08-24 12:25 UTCVendor advisory
  73. 2026-08-23 16:42 UTCEG score recompute
  74. 2026-08-23 16:42 UTCVendor advisory

Publicly available exploits

(1 reference)

Public exploit code is referenced for this CVE (1 GitHub PoC). Defenders should treat patch urgency accordingly.

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-9277?
CVE-2026-9277 is a high-severity vulnerability; its CVE record was published on May 22, 2026. shell-quote's quote() function did not validate object-token inputs against the operator model used by parse(). The .op field was backslash-escaped character by character using /(.)/g, which in JavaScript does not match line terminators (\n, \r, U+2028, U+2029). A line terminator in .op therefore…
When was the CVE record for CVE-2026-9277 published?
The CVE record for CVE-2026-9277 was published on May 22, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 14, 2026; the record at its source may have been updated since.
Is CVE-2026-9277 actively exploited?
CVE-2026-9277 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-9277?
CVE-2026-9277 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-9277?
A fix for CVE-2026-9277 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-9277 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-9277

Explore →

Is Your Infrastructure Affected by CVE-2026-9277?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs