CVE-2026-15806: `HTTPPasswordMgr` can send saved HTTPS credentials via HTTP because of incorrect scheme matching
CSIRTS triage
- What
- HTTPPasswordMgr sends saved HTTPS credentials over HTTP due to incorrect URL scheme matching.
- Who is affected
- Python applications using HTTPPasswordMgr for credential management.
- Urgency
- Moderate; credentials may be leaked in cleartext over HTTP but exploitation requires man-in-the-middle position.
- Action
- Update Python to a patched version once released.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-15806
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-158060.43% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 36% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-15806 | coverage & exploitation status | NVD · CVE.org |
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