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Fencer Vulns
high 7.5

CVE-2025-9086 json

Out of bounds read for cookie path

published 2025-09-12 13 mo ago modified 2026-10-19 20 d ago also EUVD-2025-29014 , GHSA-v676-f8gm-92r9 , JLSEC-2026-435

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 73%
public exploits
0
none known

Summary

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.

Patch / fix

  • julia CURL_jll 8.16.0+0
  • julia LibCURL_jll 8.16.0+0
  • curl curl 8.14.2, 8.16.0
  • Siemens RUGGEDCOM RST2428P V3.3, V4.0
  • Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family V3.3
  • Siemens SCALANCE XCH328 V3.3
  • Siemens SCALANCE XCM324 V3.3
  • Siemens SCALANCE XCM328 V3.3
  • Siemens SCALANCE XCM332 V3.3
  • Siemens SCALANCE XRH334 (24 V DC, 8xFO, CC) V3.3
  • Siemens SCALANCE XRM334 (230 V AC, 12xFO) V3.3
  • Siemens SCALANCE XRM334 (230 V AC, 8xFO) V3.3
  • Siemens SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) V3.3
  • Siemens SCALANCE XRM334 (24 V DC, 12xFO) V3.3
  • Siemens SCALANCE XRM334 (24 V DC, 8xFO) V3.3
  • Siemens SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+) V3.3
  • Siemens SCALANCE XRM334 (2x230 V AC, 12xFO) V3.3
  • Siemens SCALANCE XRM334 (2x230 V AC, 8xFO) V3.3
  • Siemens SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+) V3.3
  • curl Debian 13 8.14.1-2+deb13u1
  • curl Debian 14 8.16.0~rc2-1

debian advisories DEBIAN-CVE-2025-9086

  • curl Ubuntu 25.10 8.14.1-2ubuntu1.1

ubuntu advisories UBUNTU-CVE-2025-9086

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • curl hummingbird 1 8.23.0-0.1.hum1
  • libcurl hummingbird 1 8.23.0-0.1.hum1
  • libcurl-minimal hummingbird 1 8.23.0-0.1.hum1
  • curl hummingbird 1 8.22.0-1.1.hum1
  • libcurl hummingbird 1 8.22.0-1.1.hum1
  • libcurl-minimal hummingbird 1 8.22.0-1.1.hum1
  • curl hummingbird 1 8.19.0-3.hum1
  • libcurl hummingbird 1 8.19.0-3.hum1

red hat advisories RHSA-2026:82895RHSA-2026:77255RHSA-2026:6893RHSA-2026:1825RHSA-2026:1477RHSA-2026:1350

  • curl SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 8.14.1-160000.3.1
  • curl-mini SLES for SAP applications 16.0, SLES 16.0 8.14.1-160000.3.1
  • curl Linux Micro 6.1 8.14.1-slfo.1.1_2.1
  • curl Linux Micro 6.0 8.14.1-1.1
  • curl SLES for SAP 15 SP3, SLES 15 SP3-LTSS, SLE Micro 5.2 +3 more 8.14.1-150200.4.91.1
  • brotli SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES for SAP 15 SP3 +19 more 1.0.7-150200.3.5.1
  • curl SLES for SAP 15 SP4, SLES 15 SP5-LTSS, SLES 15 SP4-LTSS +11 more 8.14.1-150400.5.69.1
  • curl SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, openSUSE Leap 15.6 8.14.1-150600.4.28.1

suse advisories SUSE-SU-2025:21077-1SUSE-SU-2025:21145-1SUSE-SU-2025:20802-1SUSE-SU-2025:20824-1SUSE-SU-2025:03268-1SUSE-SU-2025:03267-1

  • curl openSUSE Leap 16.0 8.14.1-160000.3.1
  • curl openSUSE Tumbleweed 8.16.0-1.1

opensuse advisories openSUSE-SU-2025:20090-1openSUSE-SU-2025:15590-1

  • curl AlmaLinux 10 8.12.1-2.el10_1.2
  • libcurl AlmaLinux 10 8.12.1-2.el10_1.2
  • libcurl-minimal AlmaLinux 10 8.12.1-2.el10_1.2
  • curl AlmaLinux 9 7.76.1-35.el9_7.3
  • libcurl AlmaLinux 9 7.76.1-35.el9_7.3
  • curl-minimal AlmaLinux 9 7.76.1-35.el9_7.3
  • libcurl-minimal AlmaLinux 9 7.76.1-35.el9_7.3
  • curl AlmaLinux 8 7.61.1-34.el8_10.9

almalinux advisories ALSA-2026:1825ALSA-2026:1350ALSA-2025:23383

  • curl Rocky Linux 10 8.12.1-2.el10_1.2
  • curl Rocky Linux 9 7.76.1-35.el9_7.3
  • curl Rocky Linux 8 7.61.1-34.el8_10.9

rocky linux advisories RLSA-2026:1825RLSA-2026:1350RLSA-2025:23383

  • curl Alpine 3.22, Alpine 3.21, Alpine 3.20 +1 more 8.14.1-r2
  • curl Alpine 3.24, Alpine 3.23 8.16.0-r0

alpine advisories ALPINE-CVE-2025-9086

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-9086 updated cvss 5.3

curl: libcurl: Curl out of bounds read for cookie path

  • Red Hat Enterprise Linux 6 curl, libcurl Red Hat Enterprise Linux 7 curl, libcurl Red Hat JBoss Core Services curl Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-8, openshift/ose-rhel-coreos-9 Red Hat OpenShift Dev Spaces devspaces/code-rhel9, devspaces-tech-preview/idea-rhel9 Red Hat Trusted Profile Analyzer rhtpa/rhtpa-trustification-service-rhel9
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Cert Manager support for Red Hat OpenShift release 1.18 cert-manager/cert-manager-operator-rhel9 1789029076, cert-manager/jetstack-cert-manager-rhel9 1791459711, cert-manager/cert-manager-istio-csr-rhel9 1791459759, cert-manager/cert-manager-operator-bundle 1791966259, cert-manager/jetstack-cert-manager-acmesolver-rhel9 1791459707
    fixed: vendor fix RHSA-2026:82354
  • Red Hat Discovery 2 discovery 1769104765
    fixed: vendor fix RHSA-2026:1736
  • Red Hat Enterprise Linux AppStream (v. 9) libcurl-devel 7.76.1-35.el9_7.3, curl-debuginfo 7.76.1-35.el9_7.3, curl-debugsource 7.76.1-35.el9_7.3, libcurl-debuginfo 7.76.1-35.el9_7.3, curl-minimal-debuginfo 7.76.1-35.el9_7.3, libcurl-minimal-debuginfo 7.76.1-35.el9_7.3
    fixed: vendor fix RHSA-2026:1350
  • Red Hat Enterprise Linux AppStream (v. 10) libcurl-devel 8.12.1-2.el10_1.2, curl-debuginfo 8.12.1-2.el10_1.2, curl-debugsource 8.12.1-2.el10_1.2, libcurl-debuginfo 8.12.1-2.el10_1.2, libcurl-minimal-debuginfo 8.12.1-2.el10_1.2
    fixed: vendor fix RHSA-2026:1825
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) libcurl-devel 7.76.1-31.el9_6.2, curl-debuginfo 7.76.1-31.el9_6.2, curl-debugsource 7.76.1-31.el9_6.2, libcurl-debuginfo 7.76.1-31.el9_6.2, curl-minimal-debuginfo 7.76.1-31.el9_6.2, libcurl-minimal-debuginfo 7.76.1-31.el9_6.2
    fixed: vendor fix RHSA-2025:23043
  • Red Hat Enterprise Linux BaseOS (v. 8) curl 7.61.1-34.el8_10.9, libcurl 7.61.1-34.el8_10.9, libcurl-minimal 7.61.1-34.el8_10.9
    fixed: vendor fix RHSA-2025:23383
  • Red Hat Enterprise Linux BaseOS (v. 9) curl 7.76.1-35.el9_7.3, libcurl 7.76.1-35.el9_7.3, curl-minimal 7.76.1-35.el9_7.3, libcurl-minimal 7.76.1-35.el9_7.3
    fixed: vendor fix RHSA-2026:1350
show 10 more
  • Red Hat Enterprise Linux BaseOS (v. 10) curl 8.12.1-2.el10_1.2, libcurl 8.12.1-2.el10_1.2, libcurl-minimal 8.12.1-2.el10_1.2
    fixed: vendor fix RHSA-2026:1825
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) curl 7.76.1-14.el9_0.12, libcurl 7.76.1-14.el9_0.12, curl-minimal 7.76.1-14.el9_0.12, libcurl-minimal 7.76.1-14.el9_0.12
    fixed: vendor fix RHSA-2025:23126
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) curl 7.76.1-23.el9_2.8, libcurl 7.76.1-23.el9_2.8, curl-minimal 7.76.1-23.el9_2.8, libcurl-minimal 7.76.1-23.el9_2.8
    fixed: vendor fix RHSA-2025:23127
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) curl 8.12.1-1.el10_0.4, libcurl 8.12.1-1.el10_0.4, libcurl-minimal 8.12.1-1.el10_0.4
    fixed: vendor fix RHSA-2026:1477
  • Red Hat Enterprise Linux BaseOS EUS (v.9.4) curl 7.76.1-29.el9_4.3, libcurl 7.76.1-29.el9_4.3, curl-minimal 7.76.1-29.el9_4.3, libcurl-minimal 7.76.1-29.el9_4.3
    fixed: vendor fix RHSA-2025:23125
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) curl 7.76.1-31.el9_6.2, libcurl 7.76.1-31.el9_6.2, curl-minimal 7.76.1-31.el9_6.2, libcurl-minimal 7.76.1-31.el9_6.2
    fixed: vendor fix RHSA-2025:23043
  • Red Hat Hardened Images curl 8.19.0-3.hum1, curl 8.22.0-1.1.hum1, curl 8.23.0-0.1.hum1, libcurl 8.19.0-3.hum1, libcurl 8.22.0-1.1.hum1, libcurl 8.23.0-0.1.hum1, +3 more
    fixed: vendor fix RHSA-2026:6893
  • Red Hat Insights proxy 1.5 insights-proxy 1770740405
    fixed: vendor fix RHSA-2026:2485
  • Red Hat Update Infrastructure 5 rhui5 1770646925, rhui5 1773670073, rhui5 1773670137, rhui5 1773672059
    fixed: vendor fix RHSA-2026:4943
  • Red Hat Discovery 2 discovery 1769111774 Red Hat Enterprise Linux AppStream E4S (v.9.0) libcurl-devel 7.76.1-14.el9_0.12, curl-debuginfo 7.76.1-14.el9_0.12, curl-debugsource 7.76.1-14.el9_0.12, libcurl-debuginfo 7.76.1-14.el9_0.12, curl-minimal-debuginfo 7.76.1-14.el9_0.12, libcurl-minimal-debuginfo 7.76.1-14.el9_0.12 Red Hat Enterprise Linux AppStream E4S (v.9.2) libcurl-devel 7.76.1-23.el9_2.8, curl-debuginfo 7.76.1-23.el9_2.8, curl-debugsource 7.76.1-23.el9_2.8, libcurl-debuginfo 7.76.1-23.el9_2.8, curl-minimal-debuginfo 7.76.1-23.el9_2.8, libcurl-minimal-debuginfo 7.76.1-23.el9_2.8 Red Hat Enterprise Linux AppStream EUS (v. 10.0) libcurl-devel 8.12.1-1.el10_0.4, curl-debuginfo 8.12.1-1.el10_0.4, curl-debugsource 8.12.1-1.el10_0.4, libcurl-debuginfo 8.12.1-1.el10_0.4, libcurl-minimal-debuginfo 8.12.1-1.el10_0.4 Red Hat Enterprise Linux AppStream EUS (v.9.4) libcurl-devel 7.76.1-29.el9_4.3, curl-debuginfo 7.76.1-29.el9_4.3, curl-debugsource 7.76.1-29.el9_4.3, libcurl-debuginfo 7.76.1-29.el9_4.3, curl-minimal-debuginfo 7.76.1-29.el9_4.3, libcurl-minimal-debuginfo 7.76.1-29.el9_4.3 Red Hat Enterprise Linux BaseOS E4S (v.9.0) curl 7.76.1-14.el9_0.12
    +4 more products
    Red Hat Enterprise Linux BaseOS E4S (v.9.2) curl 7.76.1-23.el9_2.8 Red Hat Enterprise Linux BaseOS EUS (v. 10.0) curl 8.12.1-1.el10_0.4 Red Hat Enterprise Linux BaseOS EUS (v.9.4) curl 7.76.1-29.el9_4.3 Red Hat Update Infrastructure 5 rhui5 1770807477, rhui5 1770808689, rhui5 1770808765, rhui5 1773668803
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-26-043-06 updated cvss 7.5

Siemens SINEC OS

  • Siemens RUGGEDCOM RST2428P (6GK6242-6PA00) < 3.3
    affected: fixed in V3.3 support.industry.siemens.com
  • Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family < 3.3
    affected: fixed in V3.3
  • Siemens SCALANCE XCH328 (6GK5328-4TS01-2EC2) < 3.3 Siemens SCALANCE XCM324 (6GK5324-8TS01-2AC2) < 3.3 Siemens SCALANCE XCM328 (6GK5328-4TS01-2AC2) < 3.3 Siemens SCALANCE XCM332 (6GK5332-0GA01-2AC2) < 3.3 Siemens SCALANCE XRH334 (24 V DC, 8xFO, CC) (6GK5334-2TS01-2ER3) < 3.3 Siemens SCALANCE XRM334 (2x230 V AC, 8xFO) (6GK5334-2TS01-4AR3) < 3.3
    +8 more products
    Siemens SCALANCE XRM334 (2x230 V AC, 12xFO) (6GK5334-3TS01-4AR3) < 3.3 Siemens SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-4AR3) < 3.3 Siemens SCALANCE XRM334 (24 V DC, 8xFO) (6GK5334-2TS01-2AR3) < 3.3 Siemens SCALANCE XRM334 (24 V DC, 12xFO) (6GK5334-3TS01-2AR3) < 3.3 Siemens SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-2AR3) < 3.3 Siemens SCALANCE XRM334 (230 V AC, 8xFO) (6GK5334-2TS01-3AR3) < 3.3 Siemens SCALANCE XRM334 (230 V AC, 12xFO) (6GK5334-3TS01-3AR3) < 3.3 Siemens SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+) (6GK5334-5TS01-3AR3) < 3.3
    affected: fixed in V3.3 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
13 mo ago

Exploit prediction

1.46% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/3294999 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia CURL_jll
>=8.13.0+0, <8.16.0+0
8.16.0+0
julia LibCURL_jll
>=8.13.0+0, <8.16.0+0
8.16.0+0

Affected products

  • curl curl
  • Siemens RUGGEDCOM RST2428P
  • Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family
  • Siemens SCALANCE XCH328
  • Siemens SCALANCE XCM324
  • Siemens SCALANCE XCM328
  • Siemens SCALANCE XCM332
  • Siemens SCALANCE XRH334 (24 V DC, 8xFO, CC)
  • Siemens SCALANCE XRM334 (230 V AC, 12xFO)
  • Siemens SCALANCE XRM334 (230 V AC, 8xFO)
  • Siemens SCALANCE XRM334 (230V AC, 2x10G, 24xSFP, 8xSFP+)
  • Siemens SCALANCE XRM334 (24 V DC, 12xFO)
  • Siemens SCALANCE XRM334 (24 V DC, 8xFO)
  • Siemens SCALANCE XRM334 (24V DC, 2x10G, 24xSFP, 8xSFP+)
  • Siemens SCALANCE XRM334 (2x230 V AC, 12xFO)
  • Siemens SCALANCE XRM334 (2x230 V AC, 8xFO)
  • Siemens SCALANCE XRM334 (2x230V AC, 2x10G, 24xSFP, 8xSFP+)

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.