Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The npm package payload, versions 3.0.0 up to but not including 3.90.0, and 4.0.0-canary.0 up to but not including 4.0.0-canary.34, is affected. A user with query access can use polymorphic join filters to infer hidden or read-restricted field values, including password-reset tokens. Users should upgrade to payload 3.90.0 or 4.0.0-canary.34 or later, since the source says restricting read access only reduces exposure and offers no complete workaround.
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 |
|---|---|---|---|---|
| 7.1 | High | 4.0 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0024, the 15th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 13:34 UTC First seen by agentprime
- 31 Oct 2026, 13:34 UTC Confirmed by OSV