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CVE-2026-77950: CWE-209 Generation of Error Message Containing Sensitive Information in ash-project ash_typescript

0
Medium
VulnerabilityCVE-2026-77950cvecve-2026-77950cwe-209
Published: 09/01/2026 (09/01/2026, 02:08:54 UTC)
Source: CVE Database V5
Vendor/Project: ash-project
Product: ash_typescript

Description

Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_typescript allows an unauthenticated attacker to receive unredacted internal error data by provoking an error shape the configured error handler does not match. apply_error_handler/3 in lib/ash_typescript/rpc/errors.ex is the only hook an application has for redacting or suppressing errors before they reach the client, with a nil return dropping the error entirely. Its rescue clause logs a warning and then returns the original, pre-handler error map. Error handlers are conventionally written as pattern-matching functions over expected error shapes, so an unmatched shape raises FunctionClauseError and the raw transformed error, including any secrets carried in vars, is emitted instead. An intent to suppress an error becomes an intent to publish it. The rescue catches exceptions only, so a handler that throws or exits still propagates. This issue affects ash_typescript: from 0.8.0 before 0.18.0.

CVSS v4.0

Score 6.3medium

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
Low
Vuln. Integrity
None
Vuln. Availability
None
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Affected software

ash_typescript
pkg:hex/ash_typescript
Affected versions
>=0.8.0 <0.18.0
GitHub Actionsmore threats →cve
ash-project/ash_typescript
pkg:github/ash-project/ash_typescript
CPE configurations
cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Data Version
5.2
Assigner Short Name
EEF
Date Reserved
2026-08-30T17:30:01.402Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a963a79acd9273b491bc8c3

Added to database: 09/01/2026, 02:37:45 UTC

Last updated: 09/01/2026, 03:22:25 UTC

Views: 4

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