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CVE-2025-4945· NVD / CVE Program· CNA redhat

Libsoup: integer overflow in cookie expiration date handling in libsoup

Noroxi assessment

Priority: Monitor (action score 14/100)

  • 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: 0.69% (FIRST EPSS); higher than 52.5% of all records.
  • 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: libsoup3 (AlmaLinux:10) 3.6.5-3.el10_1.6; libsoup3-devel (AlmaLinux:10) 3.6.5-3.el10_1.6; libsoup3-doc (AlmaLinux:10) 3.6.5-3.el10_1.6.

Low priority for now. Upgrade to libsoup3 (AlmaLinux:10) 3.6.5-3.el10_1.6; libsoup3-devel (AlmaLinux:10) 3.6.5-3.el10_1.6; libsoup3-doc (AlmaLinux:10) 3.6.5-3.el10_1.6 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 the cookie parsing logic of the libsoup HTTP library, used in GNOME applications and other software. The vulnerability arises when processing the expiration date of cookies, where a specially crafted value can trigger an integer overflow. This may result in undefined behavior, allowing an attacker to bypass cookie expiration logic, causing persistent or unintended cookie behavior. The issue stems from improper validation of large integer inputs during date arithmetic operations within the cookie parsing routines.

LowCVSS 3.7 · v3.1—No exploit Fix available
Published
May 19, 2025
Updated
Jun 30, 2026
EPSS
0.6% · 52th percentile

Report tools

JSON

Action score

14

Monitor

Low priority for now.

CVSS
14 / 40 · 3.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

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
3.7
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.

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

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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.

  • gitlab.gnome.org/GNOME/libsoup libsoup

    • up to and including 3.6.5affected · semver

  • Red Hat Red Hat Enterprise Linux 10

    • 0:3.6.5-3.el10_0.9 and laternot affected · rpm
    • 0:3.6.5-3.el10_1.6 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 6

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support

    • 0:2.62.2-9.el7_9 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8

    • 0:2.62.3-10.el8_10 and laternot affected · rpm
    • 0:2.62.3-10.el8_10 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support

    • 0:2.62.3-1.el8_2.6 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

    • 0:2.62.3-2.el8_4.6 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

    • 0:2.62.3-2.el8_4.6 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

    • 0:2.62.3-2.el8_6.6 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service

    • 0:2.62.3-2.el8_6.6 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions

    • 0:2.62.3-2.el8_6.6 and laternot affected · rpm

  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

    • 0:2.62.3-3.el8_8.6 and laternot affected · rpm

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:10libsoup3before 3.6.5-3.el10_1.63.6.5-3.el10_1.6
AlmaLinux:10libsoup3-develbefore 3.6.5-3.el10_1.63.6.5-3.el10_1.6
AlmaLinux:10libsoup3-docbefore 3.6.5-3.el10_1.63.6.5-3.el10_1.6
AlmaLinux:8libsoupbefore 2.62.3-10.el8_102.62.3-10.el8_10
AlmaLinux:8libsoup-develbefore 2.62.3-10.el8_102.62.3-10.el8_10
AlmaLinux:9libsoupbefore 2.72.0-12.el9_7.12.72.0-12.el9_7.1
AlmaLinux:9libsoup-develbefore 2.72.0-12.el9_7.12.72.0-12.el9_7.1
Debian:11libsoup2.4before 2.72.0-2+deb11u32.72.0-2+deb11u3
Debian:12libsoup2.4from 0—
Debian:12libsoup3from 0—
Debian:13libsoup3before 3.6.5-23.6.5-2
openSUSE:Leap 15.6libsoupbefore 3.4.4-150600.3.13.13.4.4-150600.3.13.1
openSUSE:Leap 15.6libsoup2before 2.74.3-150600.4.12.12.74.3-150600.4.12.1
openSUSE:Tumbleweedlibsoupbefore 3.6.5-6.13.6.5-6.1
openSUSE:Tumbleweedlibsoup2before 2.74.3-12.12.74.3-12.1
Red Hat:enterprise_linux:10.0libsoup3before 0:3.6.5-3.el10_0.90:3.6.5-3.el10_0.9
Red Hat:enterprise_linux:10.0libsoup3-debuginfobefore 0:3.6.5-3.el10_0.90:3.6.5-3.el10_0.9
Red Hat:enterprise_linux:10.0libsoup3-debugsourcebefore 0:3.6.5-3.el10_0.90:3.6.5-3.el10_0.9
Red Hat:enterprise_linux:10.0libsoup3-develbefore 0:3.6.5-3.el10_0.90:3.6.5-3.el10_0.9
Red Hat:enterprise_linux:10.0libsoup3-docbefore 0:3.6.5-3.el10_0.90:3.6.5-3.el10_0.9
Red Hat:enterprise_linux:10.1libsoup3before 0:3.6.5-3.el10_1.60:3.6.5-3.el10_1.6
Red Hat:enterprise_linux:10.1libsoup3-debuginfobefore 0:3.6.5-3.el10_1.60:3.6.5-3.el10_1.6
Red Hat:enterprise_linux:10.1libsoup3-debugsourcebefore 0:3.6.5-3.el10_1.60:3.6.5-3.el10_1.6
Red Hat:enterprise_linux:10.1libsoup3-develbefore 0:3.6.5-3.el10_1.60:3.6.5-3.el10_1.6

+56

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-2025-4476May 16, 2025 · Libsoup: null pointer dereference in libsoup may lead to denial of service
    17Monitor
  • ← EarlierCVE-2025-4948May 19, 2025 · Libsoup: integer underflow in soup_multipart_new_from_message() leading to denial of service in libsoup
    30Monitor
  • Later →CVE-2025-4969May 21, 2025 · Libsoup: off-by-one out-of-bounds read in find_boundary() in soup-multipart.c
    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
almalinux:libsoup2.62.3-10.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:libsoup-devel2.62.3-10.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:libsoup33.6.5-3.el10_1.6 · AlmaLinux:10Package registry (OSV)
almalinux:libsoup3-devel3.6.5-3.el10_1.6 · AlmaLinux:10Package registry (OSV)
almalinux:libsoup3-doc3.6.5-3.el10_1.6 · AlmaLinux:10Package registry (OSV)
debian:libsoup2.42.72.0-2+deb11u3 · Debian:11Package registry (OSV)
debian:libsoup33.6.5-2 · Debian:13Package registry (OSV)
opensuse:libsoup3.4.4-150600.3.13.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:libsoup22.74.3-150600.4.12.1 · openSUSE:Leap 15.6Package registry (OSV)
red hat:libsoup0:2.72.0-10.el9_6.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:libsoup-debuginfo0:2.72.0-10.el9_6.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:libsoup-debugsource0:2.72.0-10.el9_6.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:libsoup-devel0:2.72.0-10.el9_6.3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:libsoup30:3.6.5-3.el10_0.9 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:libsoup3-debuginfo0:3.6.5-3.el10_0.9 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:libsoup3-debugsource0:3.6.5-3.el10_0.9 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:libsoup3-devel0:3.6.5-3.el10_0.9 · Red Hat:enterprise_linux:10.0Package registry (OSV)
red hat:libsoup3-doc0:3.6.5-3.el10_0.9 · Red Hat:enterprise_linux:10.0Package registry (OSV)
rocky linux:libsoup0:2.72.0-10.el9_6.3 · Rocky Linux:9Package registry (OSV)
rocky linux:libsoup30:3.6.5-3.el10_0.9 · Rocky Linux:10Package registry (OSV)
suse:libsoup2.68.4-150200.4.12.1 · SUSE:Linux Enterprise Micro 5.2Package registry (OSV)
suse:libsoup3.4.4-150600.3.13.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package registry (OSV)
suse:libsoup22.74.3-150600.4.12.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6Package 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.

Variant candidates

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

  • CVE-2026-10649393 days apartPacemaker: pacemaker: denial of service via integer overflow in remote message decompression
    34Monitor
  • CVE-2026-10118378 days apartPoppler: integer overflow in poppler splashoutputdev::tilingpatternfill leads to heap buffer overflow via unchecked dimension multiplication
    31Monitor
  • CVE-2026-53705392 days apartGstreamer1-plugins-good: gstreamer: heap buffer overflow in wavpack decoder via integer overflow
    30Monitor
  • CVE-2026-16529437 days apartPcp: pcp: denial of service due to signed integer overflow
    30Monitor
  • CVE-2026-52722392 days apartGstreamer1-plugins-bad-free: gstreamer: signed integer overflow in vmnc decoder cursor payload handling
    28Monitor
  • CVE-2026-19389447 days apartGstreamer: gstreamer1-plugins-ugly-free: gstreamer: integer overflow/underflow in asfdemux bounds checks leading to out-of-bounds read
    28Monitor

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
none
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

CWE-190 · Integer Overflow or Wraparound

CVSS vector

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

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 (15 more)

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

All records