CVE-2023-26133 json
progressbar.js vulnerable to Prototype Pollution
published 2023-06-12 3 y ago modified 2026-06-17 4 mo ago also GHSA-89qm-hm2x-mxm3 , EUVD-2023-1747
- cvss
- 8.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.3%
- EPSS 1.3% chance of exploitation in 30 days, percentile 69%
- public exploits
- 0
- none known
Summary
All versions of the package progressbar.js are vulnerable to Prototype Pollution via the function extend() in the file utils.js.
Patch / fix
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 22 mo ago
Exploit prediction
1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- security.snyk.io https://security.snyk.io/vuln/SNYK-JS-PROGRESSBARJS-3184152 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L/E:P |
| CNA | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | progressbar.js | <1.1.1 |
1.1.1 |
Affected products
- n/a progressbar.js
Classification
- Weakness
-
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes
References
-
github.com
/kimmobrunfeldt/progressbar.js/commit/97fe68ef4beccfe84b7cba08ea1fc695e38cc04b
web
-
security.snyk.io
/vuln/SNYK-JS-PROGRESSBARJS-3184152
web, exploit, third-party-advisory
-
github.com
/kimmobrunfeldt/progressbar.js/blob/74536b9eeeaaf51144706d918ed5a0a679631d96/src/utils.js%23L20
broken-link
-
github.com
/kimmobrunfeldt/progressbar.js/blob/74536b9eeeaaf51144706d918ed5a0a679631d96/src/utils.js%23L18
broken-link
-
nvd.nist.gov
/vuln/detail/CVE-2023-26133
advisory
-
github.com
/kimmobrunfeldt/progressbar.js
package
-
github.com
/kimmobrunfeldt/progressbar.js/blob/74536b9eeeaaf51144706d918ed5a0a679631d96/src/utils.js#L18
web
-
github.com
/kimmobrunfeldt/progressbar.js/blob/74536b9eeeaaf51144706d918ed5a0a679631d96/src/utils.js#L20
web
Sources
- CVE List CVE-2023-26133
- GitHub Advisory GHSA-89qm-hm2x-mxm3
- NVD CVE-2023-26133
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.