CVE-2024-21489: uplot · Prototype Pollution
Affects uplotSource CVE Database V5
Public exploit available · CVSS 8.8 High : upgrade to 1.6.31 as a priority.
Data as of 8 Nov 2026, 23:23 UTC
- EPSS
- 0.7% chance of exploitation in 30 days – higher than 53% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 1.6.31
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:PExploitation evidence
Disclosed: evidence found.
CVE published 1 Oct 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.
What to do
Upgrade uplot to 1.6.31.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
npmuplotpkg:npm/uplotOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
If you cannot patch yet, avoid using vulnerable versions in untrusted environments or apply additional safeguards to limit exposure to untrusted input.
Description
Versions of the package uplot before 1.6.31 are vulnerable to Prototype Pollution via the uplot.assign function due to missing check if the attribute resolves to the object prototype.
References
- security.snyk.io/vuln/SNYK-JS-UPLOT-6209224 (opens in a new tab)
- security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-8163085 (opens in a new tab)
- github.com/leeoniya/uPlot/blob/c52e5001c1d959a99ac495a53e4deca5c44464d2/src/utils.js%23L437-L452 (opens in a new tab)
- github.com/leeoniya/uPlot/commit/5756e3e9b91270b303157e14bd0174311047d983 (opens in a new tab)