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CVE-2023-24540
Improper handling of JavaScript whitespace in html/template
Critical9.8EPSS 1.6%
- Published
- Updated
- Reserved
- Assigned by
- Go
Description
Not all valid JavaScript whitespace characters are considered to be whitespace. Templates containing whitespace characters outside of the character set "\t\n\f\r\u0020\u2028\u2029" in JavaScript contexts that also contain actions may not be properly sanitized during execution.
Timeline
ID reserved
By Go
- 4 months later
· 4 months later
Published
- 21 months later
· 21 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.6% · top 25% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
Affected products
Go standard library · html/template
- affected < 1.19.9
- affected 1.20.0-0 – < 1.20.4
References (5)
- https://go.dev/issue/59721 (opens in a new tab)x_transferred
- https://go.dev/cl/491616 (opens in a new tab)x_transferred
- https://groups.google.com/g/golang-announce/c/MEb0UyuSMsU (opens in a new tab)x_transferred
- https://pkg.go.dev/vuln/GO-2023-1752 (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20241115-0008/ (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-24540)Record last updated .