CVE-2026-49957

HIGHPre-NVD 7.77.7—
EchelonGraph scoreMEDIUM confidence

Score 7.7 from GitHub Security Advisory published 2026-06-09. a secondary CVSS source baseline 7.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.7Exploit: None knownExposed: 0

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

Hermes WebUI before version 0.51.296 contains a workspace boundary bypass vulnerability that allows authenticated attackers to circumvent blocked-root path checks by exploiting an early return in the SSH/remote terminal profile workspace resolution logic within _remote_terminal_workspace_candidate(). Attackers can configure a remote terminal working directory to a system directory such as /etc, causing the workspace resolution path to accept it as a trusted local workspace root before the _is_blocked_workspace_path() guard executes, enabling read access to local system files through workspace file-read helpers.

CVSS v3
7.7
EG Score
7.7(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity77% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 23, 2026

Advisory Details (5)

Auto-updated Jun 9, 2026
Patch available. Sources: github_release, github_pr, github_commit.
generic

Hermes WebUI < 0.51.269 Workspace Boundary Bypass via api/workspace.py | Advisories | VulnCheck

https://www.vulncheck.com/advisories/hermes-webui-workspace-boundary-bypass-via-api-workspace-py
github_commit Patch Available

commit 91a89fb5d5c0 (nesquena/hermes-webui)

Patch available: nesquena/hermes-webui v0.51.317 (contains commit 91a89fb5d5c0)

https://github.com/nesquena/hermes-webui/commit/91a89fb5d5c0bf87932917f9914ad0150ea62fe4
github_pr Patch Available

Release v0.51.296 — stage-3731 (remote-workspace blocked-root security fix #3731)

Patch available: nesquena/hermes-webui v0.51.317 (PR #3744 merged 2026-06-06)

https://github.com/nesquena/hermes-webui/pull/3744
github_pr

[security] reject blocked roots for remote workspaces

Upstream fix in progress (PR #3731 · nesquena/hermes-webui, state=closed)

https://github.com/nesquena/hermes-webui/pull/3731
github_release Patch Available

v0.51.269

Patch available: nesquena/hermes-webui v0.51.269

https://github.com/nesquena/hermes-webui/releases/tag/v0.51.269

Vendor Advisories for CVE-2026-49957(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 6× in last 7d / 39× 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 243 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-49957?
CVE-2026-49957 is a high vulnerability published on June 9, 2026. Hermes WebUI before version 0.51.296 contains a workspace boundary bypass vulnerability that allows authenticated attackers to circumvent blocked-root path checks by exploiting an early return in the SSH/remote terminal profile workspace resolution logic within remoteterminalworkspacecandidate().…
When was CVE-2026-49957 disclosed?
CVE-2026-49957 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49957 actively exploited?
CVE-2026-49957 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 64.4% of all scored CVEs.
What is the CVSS score of CVE-2026-49957?
CVE-2026-49957 has a CVSS v3 base score of 7.7 (NVD).
How do I remediate CVE-2026-49957?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49957, 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.

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