CVE-2026-19931

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.12% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 66.1% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-09-15.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-06 17:47Z1 MO AGO

Last updated

2026-09-15 06:02Z1 MO AGO

Reserved

2026-08-15

Assigning CNA

curl

Record state

PUBLISHED

Severity

Critical (CVSS 9.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-488Exposure of Data Element to Wrong SessionBase
• CWE-613Insufficient Session ExpirationBase

Data version

5.2

Document digest

54dc6e7aa6d095460179d4d08b9ef5af758c25deffb262c81aa236ff129375dd

• curl.sehttps://curl.se/docs/CVE-2026-19931.json
• curl.sehttps://curl.se/docs/CVE-2026-19931.html
• hackerone.comhttps://hackerone.com/reports/3923520