Prototype pollution in progressbar.js
Priority HIGH 81CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
All versions of the package progressbar.js are vulnerable to Prototype Pollution via the function extend() in the file utils.js.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01261 69th percentileScored 2026-11-07
Fix Fixed progressbar.js (npm): 1.1.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | progressbar.js | all versions | — | No fix listed | CNA |
| — | progressbar.js (npm) | before 1.1.1 | 1.1.1 | Patch available | GHSA-89qm-hm2x-mxm3 |
- progressbar.js Vendor— Affected all versions Fixed in — No fix listed CNA
- progressbar.js (npm) Vendor— Affected before 1.1.1 Fixed in 1.1.1 Patch available GHSA-89qm-hm2x-mxm3
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:progressbar.js_project:progressbar.js:*:*:*:*:*:node.js:*:* | all versions | Vulnerable | Progressbar.js Project |
- cpe:2.3:a:progressbar.js_project:progressbar.js:*:*:*:*:*:node.js:*:* Versions all versions Vulnerable ·Progressbar.js Project
Remediation
- Fix · GHSA-89qm-hm2x-mxm3 progressbar.js (npm) Fixed in 1.1.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-26133
- 2026-10-03 Alias added: GHSA-89qm-hm2x-mxm3
References
Other 6
- https://github.com/kimmobrunfeldt/progressbar.js/blob/74536b9eeeaaf51144706d918ed5a0a679631d96/src/utils.js%23L20
- https://github.com/kimmobrunfeldt/progressbar.js/blob/74536b9eeeaaf51144706d918ed5a0a679631d96/src/utils.js%23L18
- https://github.com/kimmobrunfeldt/progressbar.js/commit/97fe68ef4beccfe84b7cba08ea1fc695e38cc04b
- https://github.com/kimmobrunfeldt/progressbar.js
- https://github.com/kimmobrunfeldt/progressbar.js/blob/74536b9eeeaaf51144706d918ed5a0a679631d96/src/utils.js#L18
- https://github.com/kimmobrunfeldt/progressbar.js/blob/74536b9eeeaaf51144706d918ed5a0a679631d96/src/utils.js#L20
Sources
- CVE-2023-26133 · CVE Program
- CVE-2023-26133 · NVD
- FIRST EPSS
- GHSA-89qm-hm2x-mxm3 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences