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Medium 4.8Published Apr 29, 2026
CVE-2026-1858wget2 accepts a server certificate with incorrect Key Usage (KU) or Extended Key Usage (EKU).
Updated under an hour ago ()
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It affects gnu wget2. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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wget2 accepts a server certificate with incorrect Key Usage (KU) or Extended Key Usage (EKU). If the attackers compromise a certificate (with the associated private key) issued for a different purpose, they may be able to reuse it for TLS server authentication.
- CVSS
- 4.8 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-20
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jun 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
gnu wget2 gnu:wget2 | through 2.2.1 | NVD |
References
- https://www.tenable.com/security/research/tra-2026-37exploit, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.