Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
pymongo versions before 4.18.1 are affected. Passing a hash instead of a GridFS file ID can make it act as query criteria that override the ID match, so reads, writes or deletes may affect other files. The source does not say what access an attacker needs. Upgrade to pymongo 4.18.1 or later, or until then, pass only exact IDs to GridFS.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.1 | Medium | 4.0 | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:H/SC:N/SI:N/SA:N | CNA (mongodb) |
- CISA KEV Not listed.
- EPSS 0.0027, the 18th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:08 UTC First seen by agentprime
- 31 Oct 2026, 14:08 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-8fvv-fgr5-f8ch
- OSV: GHSA-8fvv-fgr5-f8ch
- github.com/mongodb/mongo-python-driver/security/advisories/GHSA-8fvv-fgr5-f8ch
- nvd.nist.gov/vuln/detail/CVE-2026-88029
- github.com/mongodb/mongo-python-driver/pull/3046
- github.com/mongodb/mongo-python-driver/commit/3ef1c607859589a0086446ad6f557791a2813681
- github.com/mongodb/mongo-python-driver/commit/fa676586ba4b399168a4d1d41c30dc2166cc44fd
- github.com/mongodb/mongo-python-driver
- github.com/mongodb/mongo-python-driver/releases/tag/4.18.1
- jira.mongodb.org/browse/PYTHON-5992