CVE-2026-53975

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-06. A secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.7%CVSS: 9.8Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

OpenChamber 1.11.7 contains an unauthenticated remote code execution vulnerability that allows remote attackers to execute arbitrary shell commands by sending crafted POST requests to the /api/fs/exec endpoint, which passes commands verbatim to Node.js spawn() without any allowlist, blocklist, or argument validation. The authentication middleware becomes a no-op when UI_PASSWORD is not configured, matching the default Docker deployment, enabling attackers to execute arbitrary OS commands as the application user and retrieve full command output including stdout, stderr, and exit code from the server response.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
49
EG Risk 49/100CISA 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
Severity98% × 45%
Exploitation2% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.
EPSS PROB
1.7%
EPSS %ILE
76th
KEV
Not listed

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

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high until it ships, then apply the release.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact total (CVSS ≥ 9.0). 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

August 6, 2026

Last Modified

September 16, 2026

Advisory Details (3)

Auto-updated Sep 30, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

OpenChamber 1.11.7 Unauthenticated RCE via /api/fs/exec | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openchamber-unauthenticated-rce-via-api-fs-exec
github_commit

commit f1b9506132fa (openchamber/openchamber)

Fix landed in openchamber/openchamber commit f1b9506132fa — awaiting tagged release

https://github.com/openchamber/openchamber/commit/f1b9506132faf6c564a2694c7f33b94421a49b4a
generic

GitHub - openchamber/openchamber: Agentic Development Environment based on OpenCode AI agent · GitHub

https://github.com/openchamber/openchamber

Vendor Advisories for CVE-2026-53975(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 27× in last 7d / 143× 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 344 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-53975?
CVE-2026-53975 is a critical vulnerability published on August 6, 2026. OpenChamber 1.11.7 contains an unauthenticated remote code execution vulnerability that allows remote attackers to execute arbitrary shell commands by sending crafted POST requests to the /api/fs/exec endpoint, which passes commands verbatim to Node.js spawn() without any allowlist, blocklist, or…
When was CVE-2026-53975 disclosed?
CVE-2026-53975 was first published on August 6, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53975 actively exploited?
CVE-2026-53975 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.7% probability of exploitation in the next 30 days (76th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-53975?
CVE-2026-53975 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-53975?
An upstream fix for CVE-2026-53975 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-53975 are linked in the Vendor Advisories panel on this page.

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