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Critical 9.8Published Jul 3, 2026
CVE-2026-9079stale proxy password leak
Updated under an hour ago ()
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It affects curl and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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libcurl had a flaw that when instructed to clear proxy authentication credentials which made it not do so, leaving the old credentials around to get used for subsequent transfers that should not know nor use them.
- CVSS
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-522
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- curl
- NVD analysis
- Modified
- Record last updated
- Sep 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
References
- https://curl.se/docs/CVE-2026-9079.jsonvendor-advisory
- https://curl.se/docs/CVE-2026-9079.htmlpatch, vendor-advisory
- https://hackerone.com/reports/3750295exploit, issue-tracking, 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.