Low severityNVD Advisory· Published Jul 8, 2026· Updated Jul 10, 2026
CVE-2026-55778
CVE-2026-55778
Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.9.1-alpha.11 and 8.6.81, the default fileUpload.fileExtensions blocklist could be bypassed by uploading a file with a non-standard or compound extension and dangerous content type, allowing storage adapters such as S3 and GCS to serve attacker-supplied active content and enable stored cross-site scripting. This issue is fixed in versions 9.9.1-alpha.11 and 8.6.81.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
parse-servernpm | >= 9.0.0, < 9.9.1-alpha.11 | 9.9.1-alpha.11 |
parse-servernpm | < 8.6.81 | 8.6.81 |
Affected products
2- Range: <9.9.1-alpha.11 and <8.6.81
Patches
Vulnerability mechanics
References
8- github.com/advisories/GHSA-v8x7-r927-cc93ghsaADVISORY
- github.com/parse-community/parse-server/pull/10505nvdWEB
- github.com/parse-community/parse-server/pull/10506nvdWEB
- github.com/parse-community/parse-server/security/advisories/GHSA-v8x7-r927-cc93nvdWEB
- github.com/parse-community/parse-server/commit/97c6a78d19f976ec756c1295f08a8fccab90799anvd
- github.com/parse-community/parse-server/commit/be12a60d65b6e140481882037fb896b1f951df50nvd
- github.com/parse-community/parse-server/releases/tag/8.6.81nvd
- github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.11nvd
News mentions
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