CVE-2026-92387
never-ending loop via server response omission
- Published
- Updated
- Reserved
- Assigned by
- curl
Description
By permanently omitting the final control-response line, a malicious FTP, IMAP, POP3, or SMTP server can exploit libcurl and completely bypass its configured transfer timeout mechanism, indefinitely blocking all concurrent transfers bound to the same multi-handle.
Public exploit
A reference of the record is tagged as an exploit or proof of concept: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.
- issue (opens in a new tab)exploit
Timeline
ID reserved
By curl
- 34 days later
· 34 days later
Published
- 9 days later
· 9 days 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 | High8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Awaiting Analysis | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 1.0% · top 36% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Weakness
- CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
- CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop') (opens in a new tab)All about CWE-835 and its CVEs
Affected products
- affected 8.22.0 – ≤ 8.22.0
- affected 8.21.0 – ≤ 8.21.0
- affected 8.20.0 – ≤ 8.20.0
- affected 8.19.0 – ≤ 8.19.0
- affected 8.18.0 – ≤ 8.18.0
- affected 8.17.0 – ≤ 8.17.0
- affected 8.16.0 – ≤ 8.16.0
- affected 8.15.0 – ≤ 8.15.0
- affected 8.14.1 – ≤ 8.14.1
- affected 8.14.0 – ≤ 8.14.0
- affected 8.13.0 – ≤ 8.13.0
- affected 8.12.1 – ≤ 8.12.1
- affected 8.12.0 – ≤ 8.12.0
- affected 8.11.1 – ≤ 8.11.1
- affected 8.11.0 – ≤ 8.11.0
- affected 8.10.1 – ≤ 8.10.1
- affected 8.10.0 – ≤ 8.10.0
References (3)
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-2026-92387)Record last updated .