CVE-2026-53976

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-08-06. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 2%CVSS: 9.1Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

OpenChamber 1.11.7 contains a path traversal vulnerability in the file-serving endpoints /api/fs/read, /api/fs/stat, and /api/fs/raw that allows unauthenticated remote attackers to read arbitrary files by supplying the allowOutsideWorkspace=true query parameter alongside an absolute path, bypassing the workspace boundary check in resolveReadPathFromContext. Attackers can exploit the vacuous isPathWithinRoot guard to read sensitive files such as the JWT signing secret, SSH private keys, API credentials, and environment variables, enabling full authentication bypass by forging session cookies on password-protected deployments.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
61(Track*)
EG Risk 61/100SSVC: Track*

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
Severity91% × 45%
Exploitation40% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
2%
EPSS %ILE
78%
KEV
Not listed

Published

August 6, 2026

Last Modified

August 6, 2026

Advisory Details (3)

Auto-updated Aug 6, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

OpenChamber 1.11.7 Path Traversal File Read via allowOutsideWorkspace Parameter | Advisories | VulnCheck

https://www.vulncheck.com/advisories/openchamber-path-traversal-file-read-via-allowoutsideworkspace-parameter
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: Desktop and web interface for OpenCode AI agent · GitHub

https://github.com/openchamber/openchamber

Vendor Advisories for CVE-2026-53976(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 53× in last 7d / 114× 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 114 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2026/CVE-2026-53976.yaml
    First seen Jan 1, 2026

    OpenChamber <1.13.0 - Unauthenticated Arbitrary File Read

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-53976?
CVE-2026-53976 is a critical vulnerability published on August 6, 2026. OpenChamber 1.11.7 contains a path traversal vulnerability in the file-serving endpoints /api/fs/read, /api/fs/stat, and /api/fs/raw that allows unauthenticated remote attackers to read arbitrary files by supplying the allowOutsideWorkspace=true query parameter alongside an absolute path, bypassing…
When was CVE-2026-53976 disclosed?
CVE-2026-53976 was first published in the National Vulnerability Database on August 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53976 actively exploited?
CVE-2026-53976 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2% probability of exploitation in the next 30 days, which ranks it in the top 22.0% of all scored CVEs.
What is the CVSS score of CVE-2026-53976?
CVE-2026-53976 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-53976?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53976, 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.

Dependency Blast Radius

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