CVE-2025-9086

Aliases:DEBIAN-CVE-2025-9086RHSA-2025:23043RHSA-2025:23125RHSA-2025:23126RHSA-2025:23127RHSA-2025:23383RHSA-2026:1350RHSA-2026:1477RHSA-2026:1825ALPINE-CVE-2025-9086CGA-88rr-wgh3-2m7jUBUNTU-CVE-2025-9086
Advisory lineage Upstream: 0 Downstream: 24
Modified
Published: 12 Sept 2025, 05:10
Last modified:15 Sept 2026, 06:02

Vulnerability Summary

Overall Risk (default)
medium
40/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
1.4% LOW
1% probability +1.36%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

12 Sept 2025, 05:10
Published
Vulnerability first disclosed
15 Sept 2026, 06:02
Last Modified
Vulnerability information updated

Description

1. A cookie is set using the `secure` keyword for `https://target` 2. curl is redirected to or otherwise made to speak with `http://target` (same hostname, but using clear text HTTP) using the same cookie set 3. The same cookie name is set - but with only a slash as path (`path="/"`). Since this site is not secure, the cookie *should* be ignored. 4. A bug in the path comparison logic makes curl read outside a heap buffer boundary The bug either causes a crash or it potentially makes the comparison come to the wrong conclusion and lets the clear-text site override the contents of the secure cookie, contrary to expectations and depending on the memory contents immediately following the single-byte allocation that holds the path. The presumed and correct behavior would be to plainly ignore the second set of the cookie since it was already set as secure on a secure host so overriding it on an insecure host should not be okay.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v3.1•MEDIUM•Score: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS Trends

Current EPSS score: 1.40%• Percentile: 71%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • alpine•curl

    ≥ 8.13.0, < 8.14.1-r2 | ≥ 8.13.0, < 8.14.1-r2 | ≥ 8.13.0, < 8.14.1-r2 | ≥ 8.13.0, < 8.14.1-r2 | ≥ 8.13.0, < 8.16.0-r0 | ≥ 8.13.0, < 8.16.0-r0

  • chainguard•libcurl4

    all

  • wolfi•libcurl4

    all

  • curl•curl

    8.15.0 | 8.14.1 | 8.14.0 | 8.13.0 | ≥ 8.13.0, < 8.14.2 | ≥ 8.15.0, < 8.16.0 | ≥ 1aea05a6c2699e80c75936d58569851555acd603, < c6ae07c6a541e0e96d0040afb62b45dd37711300 | 8.15.0 | 8.14.1 | 8.14.0 | 8.13.0

  • debian•curl

    < 8.14.1-2+deb13u1 | < 8.16.0~rc2-1

  • ubuntu•curl

    < 8.14.1-2ubuntu1.1

  • debian•debian_linux

    11.0

  • haxx•curl

    ≥ 8.13.0, < 8.16.0

  • redhat•curl

    < 0:7.76.1-31.el9_6.2 | < 0:7.76.1-29.el9_4.3 | < 0:7.76.1-14.el9_0.12 | < 0:7.76.1-23.el9_2.8 | < 0:7.61.1-34.el8_10.9 | < 0:7.76.1-35.el9_7.3 | < 0:8.12.1-1.el10_0.4 | < 0:8.12.1-2.el10_1.2

  • redhat•curl-debuginfo

    < 0:7.76.1-31.el9_6.2 | < 0:7.76.1-31.el9_6.2 | < 0:7.61.1-34.el8_10.9 | < 0:7.76.1-35.el9_7.3 | < 0:7.76.1-35.el9_7.3 | < 0:8.12.1-2.el10_1.2

  • redhat•curl-debugsource

    < 0:7.76.1-31.el9_6.2 | < 0:7.76.1-31.el9_6.2 | < 0:7.61.1-34.el8_10.9 | < 0:7.76.1-35.el9_7.3 | < 0:7.76.1-35.el9_7.3 | < 0:8.12.1-2.el10_1.2

  • redhat•curl-minimal

    < 0:7.76.1-31.el9_6.2 | < 0:7.76.1-29.el9_4.3 | < 0:7.76.1-14.el9_0.12 | < 0:7.76.1-23.el9_2.8 | < 0:7.76.1-35.el9_7.3

  • redhat•curl-minimal-debuginfo

    < 0:7.76.1-31.el9_6.2 | < 0:7.76.1-31.el9_6.2 | < 0:7.61.1-34.el8_10.9 | < 0:7.76.1-35.el9_7.3 | < 0:7.76.1-35.el9_7.3

  • redhat•libcurl

    < 0:7.76.1-31.el9_6.2 | < 0:7.76.1-29.el9_4.3 | < 0:7.76.1-14.el9_0.12 | < 0:7.76.1-23.el9_2.8 | < 0:7.61.1-34.el8_10.9 | < 0:7.76.1-35.el9_7.3 | < 0:8.12.1-1.el10_0.4 | < 0:8.12.1-2.el10_1.2

  • redhat•libcurl-debuginfo

    < 0:7.76.1-31.el9_6.2 | < 0:7.76.1-31.el9_6.2 | < 0:7.61.1-34.el8_10.9 | < 0:7.76.1-35.el9_7.3 | < 0:7.76.1-35.el9_7.3 | < 0:8.12.1-2.el10_1.2

  • redhat•libcurl-devel

    < 0:7.76.1-31.el9_6.2 | < 0:7.61.1-34.el8_10.9 | < 0:7.76.1-35.el9_7.3 | < 0:8.12.1-2.el10_1.2

  • redhat•libcurl-minimal

    < 0:7.76.1-31.el9_6.2 | < 0:7.76.1-29.el9_4.3 | < 0:7.76.1-14.el9_0.12 | < 0:7.76.1-23.el9_2.8 | < 0:7.61.1-34.el8_10.9 | < 0:7.76.1-35.el9_7.3 | < 0:8.12.1-1.el10_0.4 | < 0:8.12.1-2.el10_1.2

  • redhat•libcurl-minimal-debuginfo

    < 0:7.76.1-31.el9_6.2 | < 0:7.76.1-31.el9_6.2 | < 0:7.61.1-34.el8_10.9 | < 0:7.76.1-35.el9_7.3 | < 0:7.76.1-35.el9_7.3 | < 0:8.12.1-2.el10_1.2

References (34)