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CVE-2026-0716· NVD / CVE Program· CNA redhat

Libsoup: out-of-bounds read in libsoup websocket frame processing

Noroxi assessment

Priority: Monitor (action score 19/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.38% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: azl3 libsoup 3.4.4-12 on Azure Linux 3.0 3.4.4-13; azl3 libsoup 3.4.4-14 on Azure Linux 3.0 3.4.4-14; cbl2 libsoup 3.0.4-10 on CBL Mariner 2.0 3.0.4-12.

Low priority for now. Upgrade to azl3 libsoup 3.4.4-12 on Azure Linux 3.0 3.4.4-13; azl3 libsoup 3.4.4-14 on Azure Linux 3.0 3.4.4-14; cbl2 libsoup 3.0.4-10 on CBL Mariner 2.0 3.0.4-12 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in libsoup’s WebSocket frame processing when handling incoming messages. If a non-default configuration is used where the maximum incoming payload size is unset, the library may read memory outside the intended bounds. This can cause unintended memory exposure or a crash. Applications using libsoup’s WebSocket support with this configuration may be impacted.

MediumCVSS 4.8 · v3.1—No exploit Fix available
Published
Jan 13, 2026
Updated
Sep 16, 2026
EPSS
0.3% · 30th percentile

Report tools

JSON

Action score

19

Monitor

Low priority for now.

CVSS
19 / 40 · 4.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
proof of concept
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
4.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • Red Hat Red Hat Enterprise Linux 10

    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsaffected

  • Red Hat Red Hat Enterprise Linux 9

    • all versionsaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12libsoup2.4from 0—
Debian:12libsoup3from 0—
Debian:14libsoup3before 3.6.5-93.6.5-9
openSUSE:Leap 16.0libsoupbefore 3.6.5-160000.3.13.6.5-160000.3.1
openSUSE:Leap 16.0libsoup2before 2.74.3-160000.4.12.74.3-160000.4.1
openSUSE:Tumbleweedlibsoupbefore 3.6.5-11.13.6.5-11.1
openSUSE:Tumbleweedlibsoup2before 2.74.3-15.12.74.3-15.1
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSlibsoupbefore 3.0.4-150400.3.28.13.0.4-150400.3.28.1
SUSE:Linux Enterprise Micro 5.2libsoupbefore 2.68.4-150200.4.24.12.68.4-150200.4.24.1
SUSE:Linux Enterprise Micro 5.2libsoupbefore 2.68.4-150200.4.36.12.68.4-150200.4.36.1
SUSE:Linux Enterprise Micro 5.3libsoup2before 2.74.2-150400.3.26.12.74.2-150400.3.26.1
SUSE:Linux Enterprise Micro 5.3libsoup2before 2.74.2-150400.3.34.12.74.2-150400.3.34.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libsoupbefore 3.4.4-150600.3.28.13.4.4-150600.3.28.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libsoupbefore 3.4.4-150600.3.42.13.4.4-150600.3.42.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libsoupbefore 3.4.4-150600.3.28.13.4.4-150600.3.28.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libsoupbefore 3.4.4-150600.3.42.13.4.4-150600.3.42.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libsoup2before 2.74.3-150600.4.33.12.74.3-150600.4.33.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libsoup2before 2.74.3-150600.4.24.12.74.3-150600.4.24.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libsoup2before 2.74.3-150600.4.33.12.74.3-150600.4.33.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libsoup2before 2.74.3-150600.4.24.12.74.3-150600.4.24.1
SUSE:Linux Enterprise Server 12 SP5-LTSSlibsoupbefore 2.62.2-5.49.12.62.2-5.49.1
SUSE:Linux Enterprise Server 12 SP5-LTSSlibsoupbefore 2.62.2-5.34.12.62.2-5.34.1
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5libsoupbefore 2.62.2-5.40.12.62.2-5.40.1
SUSE:Linux Micro 6.0libsoupbefore 3.4.2-11.13.4.2-11.1

+4

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-10230Samba: command injection in wins server hook script
    52Plan
  • CVE-2026-4631Cockpit: cockpit: unauthenticated remote code execution due to ssh command-line argument injection
    42Plan
  • CVE-2026-76578Ipa: freeipa: freeipa: unauthenticated ldap client can obtain administrator credentials via the self-managed-token aci
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2025-14523Dec 11, 2025 · Libsoup: libsoup: duplicate host header handling causes host-parsing discrepancy (first- vs last-value wins)
    32Monitor
  • ← EarlierCVE-2026-0719Jan 8, 2026 · Libsoup: signed to unsigned conversion error leading to stack-based buffer overflow in libsoup ntlm authentication
    34Monitor
  • Later →CVE-2025-14242Jan 14, 2026 · Vsftpd: vsftpd: denial of service via integer overflow in ls command parameter parsing
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
azl3 libsoup 3.4.4-12 on Azure Linux 3.03.4.4-13 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 libsoup 3.4.4-14 on Azure Linux 3.03.4.4-14 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 libsoup 3.0.4-10 on CBL Mariner 2.03.0.4-12 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 libsoup 3.0.4-12 on CBL Mariner 2.03.0.4-12 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:libsoup33.6.5-9 · Debian:14Package registry (OSV)
opensuse:libsoup3.4.4-150600.3.28.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:libsoup22.74.3-150600.4.24.1 · openSUSE:Leap 15.6Package registry (OSV)
suse:libsoup3.0.4-150400.3.28.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOSPackage registry (OSV)
suse:libsoup3.4.4-150600.3.28.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)
suse:libsoup22.74.2-150400.3.26.1 · SUSE:Linux Enterprise Micro 5.3Package registry (OSV)
suse:libsoup22.74.3-150600.4.24.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-15028178 days apartLibarchive: heap overflow oob read while parsing a tar archive contains a pax extended header
    15Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
low · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
Low

Weakness class (CWE)

CWE-805 · Buffer Access with Incorrect Length Value

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records