CVE-2026-82733 (GCVE-0-2026-82733)
Vulnerability from cvelistv5 – Published: 2026-09-01 02:09 – Updated: 2026-09-01 15:12
VLAI
EPSS
VEX
Title
Route handler return value echoed into AshTypescript error response
Summary
Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_typescript allows an unauthenticated attacker to read internal application data from an HTTP 500 response body.
When a typed-controller route handler returns anything other than a %Plug.Conn{}, dispatch/3 in lib/ash_typescript/typed_controller/request_handler.ex passes the value to unexpected_return/2, which interpolates inspect(value, limit: 50) directly into the response message. The limit option bounds elements per collection rather than the term as a whole, so a handler falling through with a term such as {:error, %User{}} or a changeset serialises its full field set, including hashed passwords, tokens, and tenant identifiers, into the JSON error returned to the caller.
This contradicts the module's own posture elsewhere: the rescue clause gates Exception.message/1 behind AshTypescript.typed_controller_show_raised_errors?/0 and otherwise returns a generic message, while this path is ungated and always echoes.
This issue affects ash_typescript: from 0.15.0 before 0.18.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 15:11 UTC
CWE
- CWE-209 - Generation of Error Message Containing Sensitive Information
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ash-project/ash_typescript/sec… | relatedvendor-advisory |
| https://cna.erlef.org/cves/CVE-2026-82733.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-82733 | related |
| https://github.com/ash-project/ash_typescript/com… | patch |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| ash-project | ash_typescript |
Affected:
0.15.0 , < 0.18.0
(semver)
cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:* |
||
| ash-project | ash_typescript |
Affected:
546a15e1a2d7dbf1df2d5a6ee4404bc3da87852e , < dec80e29543f96e43eeece8501376562f17ac638
(git)
cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:* |
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\"\u0027Elixir.AshTypescript.TypedController.RequestHandler\u0027:handle/4\"}]}, {\"cpes\": [\"cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/ash-project/ash_typescript\", \"vendor\": \"ash-project\", \"modules\": [\"\u0027Elixir.AshTypescript.TypedController.RequestHandler\u0027\"], \"product\": \"ash_typescript\", \"versions\": [{\"status\": \"affected\", \"version\": \"546a15e1a2d7dbf1df2d5a6ee4404bc3da87852e\", \"lessThan\": \"dec80e29543f96e43eeece8501376562f17ac638\", \"versionType\": \"git\"}], \"packageURL\": \"pkg:github/ash-project/ash_typescript\", \"packageName\": \"ash-project/ash_typescript\", \"programFiles\": [\"lib/ash_typescript/typed_controller/request_handler.ex\"], \"collectionURL\": \"https://github.com\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.AshTypescript.TypedController.RequestHandler\u0027:unexpected_return/2\"}, {\"name\": \"\u0027Elixir.AshTypescript.TypedController.RequestHandler\u0027:handle/4\"}]}], \"references\": [{\"url\": \"https://github.com/ash-project/ash_typescript/security/advisories/GHSA-ghhw-qh7p-55xr\", \"tags\": [\"related\", \"vendor-advisory\"]}, {\"url\": \"https://cna.erlef.org/cves/CVE-2026-82733.html\", \"tags\": [\"related\"]}, {\"url\": \"https://osv.dev/vulnerability/EEF-CVE-2026-82733\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/ash-project/ash_typescript/commit/dec80e29543f96e43eeece8501376562f17ac638\", \"tags\": [\"patch\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_typescript allows an unauthenticated attacker to read internal application data from an HTTP 500 response body.\\n\\nWhen a typed-controller route handler returns anything other than a %Plug.Conn{}, dispatch/3 in lib/ash_typescript/typed_controller/request_handler.ex passes the value to unexpected_return/2, which interpolates inspect(value, limit: 50) directly into the response message. The limit option bounds elements per collection rather than the term as a whole, so a handler falling through with a term such as {:error, %User{}} or a changeset serialises its full field set, including hashed passwords, tokens, and tenant identifiers, into the JSON error returned to the caller.\\n\\nThis contradicts the module\u0027s own posture elsewhere: the rescue clause gates Exception.message/1 behind AshTypescript.typed_controller_show_raised_errors?/0 and otherwise returns a generic message, while this path is ungated and always echoes.\\n\\nThis issue affects ash_typescript: from 0.15.0 before 0.18.0.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eGeneration of Error Message Containing Sensitive Information vulnerability in ash-project ash_typescript allows an unauthenticated attacker to read internal application data from an HTTP 500 response body.\u003c/p\u003e\\n\u003cp\u003eWhen a typed-controller route handler returns anything other than a \u003ccode\u003e%Plug.Conn{}\u003c/code\u003e, \u003ccode\u003edispatch/3\u003c/code\u003e in \u003ccode\u003elib/ash_typescript/typed_controller/request_handler.ex\u003c/code\u003e passes the value to \u003ccode\u003eunexpected_return/2\u003c/code\u003e, which interpolates \u003ccode\u003einspect(value, limit: 50)\u003c/code\u003e directly into the response message. The \u003ccode\u003elimit\u003c/code\u003e option bounds elements per collection rather than the term as a whole, so a handler falling through with a term such as \u003ccode\u003e{:error, %User{}}\u003c/code\u003e or a changeset serialises its full field set, including hashed passwords, tokens, and tenant identifiers, into the JSON error returned to the caller.\u003c/p\u003e\\n\u003cp\u003eThis contradicts the module\u0027s own posture elsewhere: the \u003ccode\u003erescue\u003c/code\u003e clause gates \u003ccode\u003eException.message/1\u003c/code\u003e behind \u003ccode\u003eAshTypescript.typed_controller_show_raised_errors?/0\u003c/code\u003e and otherwise returns a generic message, while this path is ungated and always echoes.\u003c/p\u003e\\n\u003cp\u003eThis issue affects ash_typescript: from 0.15.0 before 0.18.0.\u003c/p\u003e\", \"base64\": false}, {\"type\": \"text/markdown\", \"value\": \"Generation of Error Message Containing Sensitive Information vulnerability in ash-project ash_typescript allows an unauthenticated attacker to read internal application data from an HTTP 500 response body.\\n\\nWhen a typed-controller route handler returns anything other than a `%Plug.Conn{}`, `dispatch/3` in `lib/ash_typescript/typed_controller/request_handler.ex` passes the value to `unexpected_return/2`, which interpolates `inspect(value, limit: 50)` directly into the response message. The `limit` option bounds elements per collection rather than the term as a whole, so a handler falling through with a term such as `{:error, %User{}}` or a changeset serialises its full field set, including hashed passwords, tokens, and tenant identifiers, into the JSON error returned to the caller.\\n\\nThis contradicts the module\u0027s own posture elsewhere: the `rescue` clause gates `Exception.message/1` behind `AshTypescript.typed_controller_show_raised_errors?/0` and otherwise returns a generic message, while this path is ungated and always echoes.\\n\\nThis issue affects ash_typescript: from 0.15.0 before 0.18.0.\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-209\", \"description\": \"CWE-209 Generation of Error Message Containing Sensitive Information\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"The application exposes an AshTypescript typed controller over HTTP with a route handler that can return a non-Plug.Conn term carrying sensitive data.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eThe application exposes an AshTypescript typed controller over HTTP with a route handler that can return a non-\u003ccode\u003ePlug.Conn\u003c/code\u003e term carrying sensitive data.\u003c/p\u003e\", \"base64\": false}, {\"type\": \"text/markdown\", \"value\": \"The application exposes an AshTypescript typed controller over HTTP with a route handler that can return a non-`Plug.Conn` term carrying sensitive data.\", \"base64\": false}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"0.18.0\", \"versionStartIncluding\": \"0.15.0\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-09-01T02:09:22.784Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-82733\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-01T15:12:07.507Z\", \"dateReserved\": \"2026-08-31T00:59:10.001Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-09-01T02:09:22.784Z\", \"assignerShortName\": \"EEF\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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