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BIT-parse-2026-30938 — Parse Server has denylist `requestKeywordDenylist` keyword scan bypass through nested object placement

2026-10-07T08:37:28.053981+00:00

Affected: Bitnami: parse

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.12 and 9.5.1, the requestKeywordDenylist security control can be bypassed by placing any nested object or array before a prohibited keyword in the request payload. This is caused by a logic bug that stops scanning sibling keys after encountering the first nested value. Any custom requestKeywordDenylist entries configured by the developer are equally by-passable using the same technique. All Parse Server deployments are affected. The requestKeywordDenylist is enabled by default. This vulnerability is fixed in 8.6.12 and 9.5.1. Use a Cloud Code beforeSave trigger to validate incoming data for prohibited keywords across all classes.

EUVD-2026-275280

2026-10-07T08:37:28.054042+00:00

EUVD-2026-275280

fkie_cve-2026-30938

2026-10-07T08:37:28.054059+00:00

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.12 and 9.5.1-alpha.1, the requestKeywordDenylist security control can be bypassed by placing any nested object or array before a prohibited keyword in the request payload. This is caused by a logic bug that stops scanning sibling keys after encountering the first nested value. Any custom requestKeywordDenylist entries configured by the developer are equally by-passable using the same technique. All Parse Server deployments are affected. The requestKeywordDenylist is enabled by default. This vulnerability is fixed in 8.6.12 and 9.5.1-alpha.1. Use a Cloud Code beforeSave trigger to validate incoming data for prohibited keywords across all classes.

GHSA-q342-9w2p-57fp — Parse Server has denylist `requestKeywordDenylist` keyword scan bypass through nested object placement

2026-10-07T08:37:28.054086+00:00

Affected: npm: parse-server

### Impact

The `requestKeywordDenylist` security control can be bypassed by placing any nested object or array before a prohibited keyword in the request payload. This is caused by a logic bug that stops scanning sibling keys after encountering the first nested value. Any custom `requestKeywordDenylist` entries configured by the developer are equally by-passable using the same technique.

All Parse Server deployments are affected. The `requestKeywordDenylist` is enabled by default.

### Patches

The fix replaces the recursive object scanner with an iterative stack-based traversal that processes all nested values without prematurely exiting the scan loop. This also eliminates a potential stack overflow on deeply nested payloads.

### Workarounds

Use a Cloud Code `beforeSave` trigger to validate incoming data for prohibited keywords across all classes.

### References

- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w2p-57fp - Fix Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.1 - Fix Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.12