CVE-2026-34430

CRITICALNVD 9.69.6
EchelonGraph scoreMEDIUM confidence

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

This critical-severity CVE scores 9.6 under NVD CVSS v3. EPSS exploit probability: 0.4% (34th percentile of EPSS-scored CVEs). GitHub Security Advisory CVSS 8.8 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 2026-04-01) is not newer than that change (2026-10-26), so it does not.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week

Also known asEUVD-2026-17903 (ENISA EUVD) · GHSA-gxx6-2vwg-3gc3 (GitHub Security Advisories)Source: ENISA EUVD

9.6EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 9.6Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

ByteDance DeerFlow versions prior to commit 92c7a20 contain a sandbox escape vulnerability in bash tool handling that allows attackers to execute arbitrary commands on the host system by bypassing regex-based validation using shell features such as directory changes and relative paths. Attackers can exploit the incomplete shell semantics modeling to read and modify files outside the sandbox boundary and achieve arbitrary command execution through subprocess invocation with shell interpretation enabled.

CVSS v3
9.6
EG Score
9.6CRITICALmedium confidence
EG Risk
43
EG Risk 43/100

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)
Severity96% × 45%
Impact severity (EG Severity): CVSS 9.6 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 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
0.4%
EPSS %ILE
34th
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 (9.6): severity, escalated by confirmed exploitation. This CVE's 9.6 is its impact severity (EG Severity), not escalated.

EG Severity
9.6 CRITICALCVSS-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. 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 low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

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

April 1, 2026

Last Modified

October 26, 2026

Advisory Details (3)

Auto-updated Oct 7, 2026
Patch available. Sources: github_pr, github_commit.
Web page

ByteDance DeerFlow LocalSandboxProvider Host Bash Escape | Advisories | VulnCheck

https://www.vulncheck.com/advisories/bytedance-deerflow-localsandboxprovider-host-bash-escape
GitHub commit Patch Available

commit 92c7a20cb74a (bytedance/deer-flow)

Patch available: bytedance/deer-flow v2.0.0 (contains commit 92c7a20cb74a)

https://github.com/bytedance/deer-flow/commit/92c7a20cb74addc3038d2131da78f2e239ef542e
GitHub pull request Patch Available

[Security] Address critical host-shell escape in LocalSandboxProvider

Patch available: bytedance/deer-flow v2.0.0 (PR #1547 merged 2026-03-29)

https://github.com/bytedance/deer-flow/pull/1547

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 21× in last 7d / 70× 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 288 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 189 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  2. 2026-10-29 14:31 UTCEG score recompute
  3. 2026-10-29 14:31 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  4. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  5. 2026-10-28 13:49 UTCEG score recompute
  6. 2026-10-28 13:49 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  7. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  8. 2026-10-27 12:51 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  9. 2026-10-26 22:26 UTCEG score recompute
  10. 2026-10-26 22:26 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  11. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  12. 2026-10-26 02:17 UTCEG score recompute
  13. 2026-10-26 02:17 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  14. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-10-25 14:33 UTCEG score recompute
  16. 2026-10-25 01:35 UTCEG score recompute
  17. 2026-10-25 01:35 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  18. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  19. 2026-10-24 00:54 UTCEG score recompute
  20. 2026-10-24 00:54 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  21. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  22. 2026-10-23 00:12 UTCEG score recompute
  23. 2026-10-23 00:11 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  24. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  25. 2026-10-21 23:28 UTCEG score recompute
Show 74 more
  1. 2026-10-21 23:28 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  2. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  3. 2026-10-20 22:44 UTCEG score recompute
  4. 2026-10-20 22:44 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  5. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  6. 2026-10-19 22:00 UTCEG score recompute
  7. 2026-10-19 22:00 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  8. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  9. 2026-10-18 20:50 UTCEG score recompute
  10. 2026-10-18 20:50 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  11. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  12. 2026-10-18 03:45 UTCEG score recompute
  13. 2026-10-17 19:55 UTCEG score recompute
  14. 2026-10-17 19:55 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  15. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  16. 2026-10-16 19:12 UTCEG score recompute
  17. 2026-10-16 19:12 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  18. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  19. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  20. 2026-10-15 16:21 UTCEG score recompute
  21. 2026-10-15 16:21 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  22. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  23. 2026-10-14 10:33 UTCEG score recompute
  24. 2026-10-14 10:32 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  25. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  26. 2026-10-13 09:02 UTCEG score recompute
  27. 2026-10-13 09:02 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  28. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  29. 2026-10-12 16:12 UTCEG score recompute
  30. 2026-10-12 08:19 UTCGHSA enrichmentGHSA-gxx6-2vwg-3gc3 · GitHub severity HIGH · GitHub CVSS 8.8
  31. 2026-10-11 19:54 UTCEG score recompute
  32. 2026-10-11 17:08 UTCEG score recompute
  33. 2026-10-11 14:35 UTCEG score recompute
  34. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  35. 2026-10-11 02:31 UTCOSV refresh
  36. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  37. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  38. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  39. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  40. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  41. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  42. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  43. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  44. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  45. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  46. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  47. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  48. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  49. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  50. 2026-09-21 14:19 UTCOSV refresh
  51. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  52. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  53. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  54. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  55. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  56. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  57. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  58. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  59. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  60. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  61. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  62. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  63. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  64. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  65. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  66. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  67. 2026-09-02 11:44 UTCOSV refresh
  68. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  69. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  70. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  71. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  72. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  73. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  74. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 32nd percentile

Frequently asked(5)

What is CVE-2026-34430?
CVE-2026-34430 is a critical-severity vulnerability; its CVE record was published on April 1, 2026. ByteDance DeerFlow versions prior to commit 92c7a20 contain a sandbox escape vulnerability in bash tool handling that allows attackers to execute arbitrary commands on the host system by bypassing regex-based validation using shell features such as directory changes and relative paths. Attackers…
When was the CVE record for CVE-2026-34430 published?
The CVE record for CVE-2026-34430 was published on April 1, 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 October 26, 2026; the record at its source may have been updated since.
Is CVE-2026-34430 actively exploited?
CVE-2026-34430 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-34430?
CVE-2026-34430 has a CVSS v3 base score of 9.6 (NVD).
How do I remediate CVE-2026-34430?
A fix for CVE-2026-34430 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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