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TI-2026-54252 Aliases CVE-2026-77956

EEx template evaluation of prompt content in AshAi enables remote code execution

Priority HIGH 74CWE-94Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-94.

Summary

Improper Control of Generation of Code (Code Injection) vulnerability in ash-project ash_ai allows a remote, unauthenticated client to execute arbitrary Elixir code. AshAi.Actions.Prompt evaluates prompt content through EEx.eval_string/2. The documented prompt: fn input, context -> ... end form lets the prompt content be built from action arguments, so when a prompt action's text incorporates request data, that attacker-controlled text is compiled and run as an EEx template (Elixir source). Content such as <%= System.cmd(...) %> therefore executes on the server before any model request is made, requiring no authentication beyond reaching a prompt action. The fix stops evaluating function-supplied prompt content as EEx; only statically configured templates are evaluated. This issue affects ash_ai: from 0.1.0 before 1.0.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00282 20th percentileScored 2026-11-07
Fix Fixed ash_ai (ash-project): 1.0.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ash-projectash_ai0.1.0 to before 1.0.01.0.0Patch availableCNA
  • ash_ai Vendorash-project Affected 0.1.0 to before 1.0.0 Fixed in 1.0.0 Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:ash-project:ash_ai:*:*:*:*:*:*:*:*———
  • cpe:2.3:a:ash-project:ash_ai:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

  • Fix · CNA ash_ai (ash-project) Fixed in 1.0.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    ash-project ash_ai 1.0.0

    6 records Highest priority Priority HIGH 2 HIGH, 4 MEDIUM

    Other records, highest priority first

    • TI-2026-56145 MCP DNS-rebinding origin check in AshAi is bypassed by a spoofed X-Forwarded-Proto headerPriority HIGH 68
    • TI-2026-56918 Identity tool filter in AshAi accepts operator maps, allowing update or destroy of unidentified recordsPriority MEDIUM 64
    • TI-2026-53035 AshAi vectorize change leaks raw embedding-provider errors, including credentials, in a user-facing errorPriority MEDIUM 64
    Show all 6 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-77956

References

Patch 1

Advisory 1

Other 2

  • TI-2026-56298 Query-complexity limit bypass via first/last pagination arguments in AshGraphql enables denial of service CVSS 4.0HIGH 8.7
  • TI-2026-52572 Unbounded atom creation from client-supplied RPC field names in AshTypescript field formatter CVSS 4.0HIGH 8.7
  • TI-2026-57010 Path traversal in AshAdmin file uploads via unsanitized client filename CVSS 4.0HIGH 8.3
  • TI-2026-26840 Ash Framework: Ash.Type.Module.cast_input/2 atom exhaustion via unchecked Module.concat allows BEAM VM crash CVSS 4.0HIGH 8.2
  • TI-2026-54208 Stored XSS in AshAdmin relationship typeahead via unescaped label_field content CVSS 4.0HIGH 8.4
  • TI-2026-56295 Unhandled KeyError in AshGraphql relay node resolution crashes queries via an unknown type segment CVSS 4.0MEDIUM 6.9
See all 90 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences