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CVE-2026-85534

Libsoup: libsoup: http/2 client crash in on_data_source_read_callback when settings initial_window_size shrinks during deferred body read

5.9 MediumFix available

A flaw was found in libsoup. When a client sends an HTTP/2 request body from a non-pollable input stream, the library can buffer more data than the current flow-control window later allows. A malicious HTTP/2 server can shrink SETTINGS_INITIAL_WINDOW_SIZE while that buffered read is still in progress. The client then copies the full buffer into a smaller DATA callback without a runtime bounds check, which can abort the process or fail the HTTP/2 session.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
High
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.32%Unchanged since Sep 5, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.9

Libsoup: libsoup: http/2 client crash in on_data_source_read_callback when settings initial_window_size shrinks during deferred body read

A flaw was found in libsoup. When a client sends an HTTP/2 request body from a non-pollable input stream, the library can buffer more data than the current flow-control window later allows. A malicious HTTP/2 server can shrink SETTINGS_INITIAL_WINDOW_SIZE while that buffered read is still in progress. The client then copies the full buffer into a smaller DATA callback without a runtime bounds check, which can abort the process or fail the HTTP/2 session.

Record
CVE-2026-85534
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-617
Updated
2026-11-06
EUVDEUVD-2026-70997 5.9

A flaw was found in libsoup. When a client sends an HTTP/2 request body from a non-pollable input stream, the library can buffer more data than the current flow-control window later allows. A malicious HTTP/2 server can shrink SETTINGS_INITIAL_WINDOW_SIZE while that buffered read is still in progress. The client then copies the full buffer into a smaller DATA callback without a runtime bounds check, which can abort the process or fail the HTTP/2 session.

Record
EUVD-2026-70997
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-06
GitHub AdvisoriesGHSA-qm5f-xr9c-mm27 5.9

A flaw was found in libsoup. When a client sends an HTTP/2 request body from a non-pollable input...

A flaw was found in libsoup. When a client sends an HTTP/2 request body from a non-pollable input stream, the library can buffer more data than the current flow-control window later allows. A malicious HTTP/2 server can shrink SETTINGS_INITIAL_WINDOW_SIZE while that buffered read is still in progress. The client then copies the full buffer into a smaller DATA callback without a runtime bounds check, which can abort the process or fail the HTTP/2 session.

Record
GHSA-qm5f-xr9c-mm27
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-617
Updated
2026-11-02
NVD 5.9

A flaw was found in libsoup. When a client sends an HTTP/2 request body from a non-pollable input stream, the library can buffer more data than the current flow-control window later allows. A malicious HTTP/2 server can shrink SETTINGS_INITIAL_WINDOW_SIZE while that buffered read is still in progress. The client then copies the full buffer into a smaller DATA callback without a runtime bounds check, which can abort the process or fail the HTTP/2 session.

Record
CVE-2026-85534
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-617
Updated
2026-11-06
OSVDEBIAN-CVE-2026-85534 5.9

A flaw was found in libsoup. When a client sends an HTTP/2 request body from a non-pollable input stream, the library can buffer more data than the current flow-control window later allows. A malicious HTTP/2 server can shrink SETTINGS_INITIAL_WINDOW_SIZE while that buffered read is still in progress. The client then copies the full buffer into a smaller DATA callback without a runtime bounds check, which can abort the process or fail the HTTP/2 session.

Record
DEBIAN-CVE-2026-85534
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-85534 5.9

A flaw was found in libsoup. When a client sends an HTTP/2 request body from a non-pollable input stream, the library can buffer more data than the current flow-control window later allows. A malicious HTTP/2 server can shrink SETTINGS_INITIAL_WINDOW_SIZE while that buffered read is still in progress. The client then copies the full buffer into a smaller DATA callback without a runtime bounds check, which can abort the process or fail the HTTP/2 session.

Record
UBUNTU-CVE-2026-85534
CVSS 3.1
5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 12 moreShow less
OSVAZL-99912 No score

CVE-2026-85534 affecting package libsoup 3.4.4-18

A flaw was found in libsoup. When a client sends an HTTP/2 request body from a non-pollable input stream, the library can buffer more data than the current flow-control window later allows. A malicious HTTP/2 server can shrink SETTINGS_INITIAL_WINDOW_SIZE while that buffered read is still in progress. The client then copies the full buffer into a smaller DATA callback without a runtime bounds check, which can abort the process or fail the HTTP/2 session.

Record
AZL-99912
Updated
2026-11-05
OSVopenSUSE-SU-2026:11823-1 No score

libsoup-3_0-0-3.6.6-9.1 on GA media

These are all security issues fixed in the libsoup-3_0-0-3.6.6-9.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:11823-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:21901-1 No score

Security update for libsoup

This update for libsoup fixes the following issues:

  • CVE-2026-85197: heap use-after-free in HTTP/2 client on_data_read() via GOAWAY during body upload (bsc#1279238).
  • CVE-2026-85534: heap buffer overflow in SoupSession through on_data_source_read_callback() via SETTINGS frame with crafted INITIAL_WINDOW_SIZE (bsc#1279239).
Record
openSUSE-SU-2026:21901-1
Updated
2026-11-02
OSVSUSE-SU-2026:23848-1 No score

Security update for libsoup

This update for libsoup fixes the following issues:

  • CVE-2026-85197: heap use-after-free in HTTP/2 client on_data_read() via GOAWAY during body upload (bsc#1279238).
  • CVE-2026-85534: heap buffer overflow in SoupSession through on_data_source_read_callback() via SETTINGS frame with crafted INITIAL_WINDOW_SIZE (bsc#1279239).
Record
SUSE-SU-2026:23848-1
Updated
2026-11-02
OSVSUSE-SU-2026:23857-1 No score

Security update for libsoup

This update for libsoup fixes the following issues:

  • CVE-2026-85197: heap use-after-free in HTTP/2 client on_data_read() via GOAWAY during body upload (bsc#1279238).
  • CVE-2026-85534: heap buffer overflow in SoupSession through on_data_source_read_callback() via SETTINGS frame with crafted INITIAL_WINDOW_SIZE (bsc#1279239).
Record
SUSE-SU-2026:23857-1
Updated
2026-11-02
OSVSUSE-SU-2026:23866-1 No score

Security update for libsoup

This update for libsoup fixes the following issues:

  • CVE-2026-85197: heap use-after-free in HTTP/2 client on_data_read() via GOAWAY during body upload (bsc#1279238).
  • CVE-2026-85534: heap buffer overflow in SoupSession through on_data_source_read_callback() via SETTINGS frame with crafted INITIAL_WINDOW_SIZE (bsc#1279239).
Record
SUSE-SU-2026:23866-1
Updated
2026-11-02
OSVSUSE-SU-2026:23875-1 No score

Security update for libsoup

This update for libsoup fixes the following issues:

  • CVE-2026-85197: heap use-after-free in HTTP/2 client on_data_read() via GOAWAY during body upload (bsc#1279238).
  • CVE-2026-85534: heap buffer overflow in SoupSession through on_data_source_read_callback() via SETTINGS frame with crafted INITIAL_WINDOW_SIZE (bsc#1279239).
Record
SUSE-SU-2026:23875-1
Updated
2026-11-02
OSVSUSE-SU-2026:23923-1 No score

Security update for libsoup

This update for libsoup fixes the following issues:

  • CVE-2026-85197: heap use-after-free in HTTP/2 client on_data_read() via GOAWAY during body upload (bsc#1279238).
  • CVE-2026-85534: heap buffer overflow in SoupSession through on_data_source_read_callback() via SETTINGS frame with crafted INITIAL_WINDOW_SIZE (bsc#1279239).
Record
SUSE-SU-2026:23923-1
Updated
2026-11-02
OSVSUSE-SU-2026:4273-1 No score

Security update for libsoup

This update for libsoup fixes the following issues:

  • CVE-2026-85197: heap use-after-free in HTTP/2 client on_data_read() via GOAWAY during body upload (bsc#1279238).
  • CVE-2026-85534: heap buffer overflow in SoupSession through on_data_source_read_callback() via SETTINGS frame with crafted INITIAL_WINDOW_SIZE (bsc#1279239).
Record
SUSE-SU-2026:4273-1
Updated
2026-11-02
OSVSUSE-SU-2026:4274-1 No score

Security update for libsoup

This update for libsoup fixes the following issues:

  • CVE-2026-85197: heap use-after-free in HTTP/2 client on_data_read() via GOAWAY during body upload (bsc#1279238).
  • CVE-2026-85534: heap buffer overflow in SoupSession through on_data_source_read_callback() via SETTINGS frame with crafted INITIAL_WINDOW_SIZE (bsc#1279239).
Record
SUSE-SU-2026:4274-1
Updated
2026-11-02
OSVUSN-8890-1 No score

libsoup2.4, libsoup3 vulnerabilities

It was discovered that libsoup incorrectly handled certain HTTP/2 requests. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-4271)

It was discovered that libsoup incorrectly handled certain HTTPS proxy connections. A remote attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-5119)

It was discovered that libsoup incorrectly parsed certain chunked HTTP requests. A remote attacker could possibly use this issue to bypass security controls. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-6324)

It was discovered that libsoup incorrectly handled proxy authentication credentials. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-66339)

It was discovered that libsoup incorrectly handled certain HTTP Range headers. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-77014, CVE-2026-77680)

It was discovered that libsoup incorrectly handled certain HTTP/2 connections. A remote attacker could possibly use this issue to obtain sensitive information or execute arbitrary code. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-85197)

It was discovered that libsoup incorrectly handled certain HTTP/2 transfers. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-85534)

Record
USN-8890-1
Updated
2026-11-02
OSVUSN-8890-2 No score

libsoup3 vulnerabilities

USN-8890-1 fixed vulnerabilities in libsoup. This update provides the corresponding updates for libsoup3 on Ubuntu 26.10.

Original advisory details:

It was discovered that libsoup incorrectly handled certain HTTP/2 requests. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-4271)

It was discovered that libsoup incorrectly handled certain HTTPS proxy connections. A remote attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-5119)

It was discovered that libsoup incorrectly parsed certain chunked HTTP requests. A remote attacker could possibly use this issue to bypass security controls. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-6324)

It was discovered that libsoup incorrectly handled proxy authentication credentials. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-66339)

It was discovered that libsoup incorrectly handled certain HTTP Range headers. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-77014, CVE-2026-77680)

It was discovered that libsoup incorrectly handled certain HTTP/2 connections. A remote attacker could possibly use this issue to obtain sensitive information or execute arbitrary code. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-85197)

It was discovered that libsoup incorrectly handled certain HTTP/2 transfers. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-85534)

Record
USN-8890-2
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
libsoup
Azure Linux:3
 through 3.4.4-18 None known
libsoup3
Debian:12
 All versions, plus listed versions
3.2.2-23.2.3-0+deb12u13.2.3-0+deb12u23.3.1-13.4.0-1
Show 33 moreShow less
3.4.1-13.4.2-13.4.2-23.4.2-33.4.2-43.4.3-13.4.4-13.4.4-23.4.4-33.4.4-43.4.4-53.5.2-13.6.0-13.6.0-23.6.0-33.6.0-43.6.1-13.6.4-13.6.4-23.6.4-33.6.5-13.6.5-23.6.5-33.6.5-43.6.5-53.6.5-63.6.5-73.6.5-83.6.5-93.6.6-13.8.0-13.8.0-23.8.0-3
 None known
libsoup3
Debian:13
 All versions, plus listed versions
3.6.5-33.6.5-43.6.5-53.6.5-63.6.5-7
Show 6 moreShow less
3.6.5-83.6.5-93.6.6-13.8.0-13.8.0-23.8.0-3
 None known
libsoup
SUSE:Linux Micro 6.2
From an advisory covering 2 CVEs
 before 3.6.6-160000.4.1
3.6.6-160000.4.1
libsoup
SUSE:Linux Enterprise Server 16.0
From an advisory covering 2 CVEs
 before 3.6.6-160000.4.1
3.6.6-160000.4.1
libsoup
SUSE:Linux Enterprise Server for SAP applications 16.0
From an advisory covering 2 CVEs
 before 3.6.6-160000.4.1
3.6.6-160000.4.1
libsoup
SUSE:Linux Micro 6.0
From an advisory covering 2 CVEs
 before 3.4.2-18.1
3.4.2-18.1
libsoup
SUSE:Linux Micro 6.1
From an advisory covering 2 CVEs
 before 3.4.4-slfo.1.1_11.1
3.4.4-slfo.1.1_11.1
libsoup
SUSE:Linux Enterprise Module for Basesystem 15 SP7
From an advisory covering 2 CVEs
 before 3.4.4-150600.3.53.1
3.4.4-150600.3.53.1
libsoup
SUSE:Linux Enterprise Server 15 SP6-LTSS
From an advisory covering 2 CVEs
 before 3.4.4-150600.3.53.1
3.4.4-150600.3.53.1
Show 25 moreShow less
Affected packages
PackageAffectedFixed
libsoup
SUSE:Linux Enterprise Server for SAP Applications 15 SP6
From an advisory covering 2 CVEs
 before 3.4.4-150600.3.53.1
3.4.4-150600.3.53.1
libsoup
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS
From an advisory covering 2 CVEs
 before 3.0.4-150400.3.49.1
3.0.4-150400.3.49.1
libsoup
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS
From an advisory covering 2 CVEs
 before 3.0.4-150400.3.49.1
3.0.4-150400.3.49.1
libsoup
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS
From an advisory covering 2 CVEs
 before 3.0.4-150400.3.49.1
3.0.4-150400.3.49.1
libsoup
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS
From an advisory covering 2 CVEs
 before 3.0.4-150400.3.49.1
3.0.4-150400.3.49.1
libsoup
SUSE:Linux Enterprise Server 15 SP4-LTSS
From an advisory covering 2 CVEs
 before 3.0.4-150400.3.49.1
3.0.4-150400.3.49.1
libsoup
SUSE:Linux Enterprise Server 15 SP5-LTSS
From an advisory covering 2 CVEs
 before 3.0.4-150400.3.49.1
3.0.4-150400.3.49.1
libsoup
SUSE:Linux Enterprise Server for SAP Applications 15 SP4
From an advisory covering 2 CVEs
 before 3.0.4-150400.3.49.1
3.0.4-150400.3.49.1
libsoup
SUSE:Linux Enterprise Server for SAP Applications 15 SP5
From an advisory covering 2 CVEs
 before 3.0.4-150400.3.49.1
3.0.4-150400.3.49.1
libsoup3
Ubuntu:Pro:22.04:LTS
 before 3.0.7-0ubuntu1+esm9, plus listed versions
3.0.4-23.0.4-33.0.5-13.0.7-0ubuntu13.0.7-0ubuntu1+esm1
Show 7 moreShow less
3.0.7-0ubuntu1+esm23.0.7-0ubuntu1+esm33.0.7-0ubuntu1+esm43.0.7-0ubuntu1+esm53.0.7-0ubuntu1+esm63.0.7-0ubuntu1+esm73.0.7-0ubuntu1+esm8
3.0.7-0ubuntu1+esm9
libsoup3
Ubuntu:24.04:LTS
 before 3.4.4-5ubuntu0.9, plus listed versions
3.4.2-43.4.4-13.4.4-23.4.4-43.4.4-5
Show 10 moreShow less
3.4.4-5build13.4.4-5build23.4.4-5ubuntu0.13.4.4-5ubuntu0.23.4.4-5ubuntu0.33.4.4-5ubuntu0.43.4.4-5ubuntu0.53.4.4-5ubuntu0.63.4.4-5ubuntu0.73.4.4-5ubuntu0.8
3.4.4-5ubuntu0.9
libsoup3
Ubuntu:26.10
 before 3.6.6-1ubuntu3, plus listed versions
3.6.6-1
3.6.6-1ubuntu3
libsoup3
Ubuntu:26.04:LTS
 before 3.6.6-1ubuntu0.1, plus listed versions
3.6.5-43.6.5-53.6.5-63.6.5-73.6.5-93.6.6-1
3.6.6-1ubuntu0.1
libsoup2.4
Ubuntu:Pro:16.04:LTS
From an advisory covering 8 CVEs
 before 2.52.2-1ubuntu0.3+esm8, plus listed versions
2.50.0-2debian12.52.1-12.52.2-12.52.2-1ubuntu0.12.52.2-1ubuntu0.2
Show 8 moreShow less
2.52.2-1ubuntu0.32.52.2-1ubuntu0.3+esm12.52.2-1ubuntu0.3+esm22.52.2-1ubuntu0.3+esm32.52.2-1ubuntu0.3+esm42.52.2-1ubuntu0.3+esm52.52.2-1ubuntu0.3+esm62.52.2-1ubuntu0.3+esm7
2.52.2-1ubuntu0.3+esm8
libsoup2.4
Ubuntu:Pro:18.04:LTS
From an advisory covering 8 CVEs
 before 2.62.1-1ubuntu0.4+esm9, plus listed versions
2.60.1-12.60.2-12.60.2-22.60.3-12.61.90-1
Show 13 moreShow less
2.62.0-12.62.1-12.62.1-1ubuntu0.12.62.1-1ubuntu0.32.62.1-1ubuntu0.42.62.1-1ubuntu0.4+esm12.62.1-1ubuntu0.4+esm22.62.1-1ubuntu0.4+esm32.62.1-1ubuntu0.4+esm42.62.1-1ubuntu0.4+esm52.62.1-1ubuntu0.4+esm62.62.1-1ubuntu0.4+esm72.62.1-1ubuntu0.4+esm8
2.62.1-1ubuntu0.4+esm9
libsoup2.4
Ubuntu:Pro:20.04:LTS
From an advisory covering 8 CVEs
 before 2.70.0-1ubuntu0.5+esm4, plus listed versions
2.68.2-0ubuntu12.68.2-12.68.2-22.68.2-2build22.69.90-1
Show 9 moreShow less
2.70.0-12.70.0-1ubuntu0.12.70.0-1ubuntu0.22.70.0-1ubuntu0.32.70.0-1ubuntu0.42.70.0-1ubuntu0.52.70.0-1ubuntu0.5+esm12.70.0-1ubuntu0.5+esm22.70.0-1ubuntu0.5+esm3
2.70.0-1ubuntu0.5+esm4
libsoup2.4
Ubuntu:22.04:LTS
From an advisory covering 8 CVEs
 before 2.74.2-3ubuntu0.9, plus listed versions
2.72.0-3ubuntu32.74.1-12.74.2-22.74.2-32.74.2-3ubuntu0.1
Show 7 moreShow less
2.74.2-3ubuntu0.22.74.2-3ubuntu0.32.74.2-3ubuntu0.42.74.2-3ubuntu0.52.74.2-3ubuntu0.62.74.2-3ubuntu0.72.74.2-3ubuntu0.8
2.74.2-3ubuntu0.9
libsoup3
Ubuntu:Pro:22.04:LTS
From an advisory covering 8 CVEs
 before 3.0.7-0ubuntu1+esm9, plus listed versions
3.0.4-23.0.4-33.0.5-13.0.7-0ubuntu13.0.7-0ubuntu1+esm1
Show 7 moreShow less
3.0.7-0ubuntu1+esm23.0.7-0ubuntu1+esm33.0.7-0ubuntu1+esm43.0.7-0ubuntu1+esm53.0.7-0ubuntu1+esm63.0.7-0ubuntu1+esm73.0.7-0ubuntu1+esm8
3.0.7-0ubuntu1+esm9
libsoup2.4
Ubuntu:24.04:LTS
From an advisory covering 8 CVEs
 before 2.74.3-6ubuntu1.9, plus listed versions
2.74.3-12.74.3-22.74.3-32.74.3-62.74.3-6build1
Show 9 moreShow less
2.74.3-6ubuntu12.74.3-6ubuntu1.12.74.3-6ubuntu1.22.74.3-6ubuntu1.32.74.3-6ubuntu1.42.74.3-6ubuntu1.52.74.3-6ubuntu1.62.74.3-6ubuntu1.72.74.3-6ubuntu1.8
2.74.3-6ubuntu1.9
libsoup3
Ubuntu:24.04:LTS
From an advisory covering 8 CVEs
 before 3.4.4-5ubuntu0.9, plus listed versions
3.4.2-43.4.4-13.4.4-23.4.4-43.4.4-5
Show 10 moreShow less
3.4.4-5build13.4.4-5build23.4.4-5ubuntu0.13.4.4-5ubuntu0.23.4.4-5ubuntu0.33.4.4-5ubuntu0.43.4.4-5ubuntu0.53.4.4-5ubuntu0.63.4.4-5ubuntu0.73.4.4-5ubuntu0.8
3.4.4-5ubuntu0.9
libsoup3
Ubuntu:26.04:LTS
From an advisory covering 8 CVEs
 before 3.6.6-1ubuntu0.1, plus listed versions
3.6.5-43.6.5-53.6.5-63.6.5-73.6.5-93.6.6-1
3.6.6-1ubuntu0.1
libsoup2.4
Ubuntu:Pro:26.04:LTS
From an advisory covering 8 CVEs
 before 2.74.3-10.1ubuntu5+esm3, plus listed versions
2.74.3-10.1ubuntu42.74.3-10.1ubuntu52.74.3-10.1ubuntu5+esm12.74.3-10.1ubuntu5+esm2
2.74.3-10.1ubuntu5+esm3
libsoup3
Ubuntu:26.10
From an advisory covering 8 CVEs
 before 3.6.6-1ubuntu3, plus listed versions
3.6.6-1
3.6.6-1ubuntu3
libsoup
openSUSE:Tumbleweed
From an advisory covering 2 CVEs
 before 3.6.6-9.1
3.6.6-9.1
libsoup
openSUSE:Leap 16.0
From an advisory covering 2 CVEs
 before 3.6.6-160000.4.1
3.6.6-160000.4.1

History

History
RecordedChangedSources
affectedCVE List, EUVD, NVD, OSV
facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-85534 is a medium vulnerability (CVSS 5.9) in Red Hat Enterprise Linux 10, published September 4, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 24th percentile. Fixed in libsoup3 3.0.7-0ubuntu1+esm9.

References

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