Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Golang.org/x/net versions before 0.62.0 are affected. When parsing HTML, the package coalesces adjacent text nodes by repeatedly concatenating strings, so an input containing many short text runs separated by ignored end tags can cause quadratic time and memory use. An attacker who can supply HTML to be parsed can use this to slow down or exhaust the parsing process. Upgrade to golang.org/x/net 0.62.0 or later.
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 |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N | ADP (CISA-ADP) |
- CISA KEV Not listed.
- EPSS 0.0041, the 35th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 27 Oct 2026, 21:38 UTC Confirmed by the CVE List
- 27 Oct 2026, 22:18 UTC Confirmed by NVD
- 31 Oct 2026, 14:11 UTC First seen by agentprime
- 31 Oct 2026, 14:11 UTC Confirmed by OSV