01 Record
CVE-2026-55778
Parse Server: Stored XSS via non-standard file extension bypassing file upload extension blocklist
LowPUBLISHEDCNA: GitHub_M
CNA base score2.1 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
02 Description
Parse Server: Stored XSS via non-standard file extension bypassing file upload extension blocklist
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.55% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 45.9% of scored records. A rank, not a probability.
- NVD base score
- 2.1 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Deferred. NVD last modified this record on 2026-10-25.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-07-08 20:50Z3 MO AGO
- Last updated
- 2026-07-09 13:39Z3 MO AGO
- Reserved
- 2026-06-17
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- Low (CVSS 2.1)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N
- Weaknesses
- CWE-434Unrestricted Upload of File with Dangerous TypeBase
- Data version
- 5.2
- Document digest
- a8e08841f70629dc6bdd0257642798b77f4be43f9157ca428ceee52b986be4e1
05 Affected products
VendorProductVersionsPlatforms
06 References
- github.comhttps://github.com/parse-community/parse-server/security/advisories/GHSA-v8x7-r927-cc93
- github.comhttps://github.com/parse-community/parse-server/pull/10505
- github.comhttps://github.com/parse-community/parse-server/pull/10506
- github.comhttps://github.com/parse-community/parse-server/commit/97c6a78d19f976ec756c1295f08a8fccab90799a
- github.comhttps://github.com/parse-community/parse-server/commit/be12a60d65b6e140481882037fb896b1f951df50
- github.comhttps://github.com/parse-community/parse-server/releases/tag/8.6.81
- github.comhttps://github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.11