CVE-2025-46420

MEDIUMNVD 6.56.5—

6.5

A flaw was found in libsoup. It is vulnerable to memory leaks in the soup_header_parse_quality_list() function when parsing a quality list that contains elements with all zeroes.

CVSS v3: 6.5
EG Score: 6.5(medium)
EPSS: 65.0%
KEV: Not listed

Published

April 24, 2025

Last Modified

April 15, 2026

References (12)

secalert@redhathttps://access.redhat.com/errata/RHSA-2025:4439
secalert@redhathttps://access.redhat.com/errata/RHSA-2025:4440
secalert@redhathttps://access.redhat.com/errata/RHSA-2025:4508
secalert@redhathttps://access.redhat.com/errata/RHSA-2025:4538
secalert@redhathttps://access.redhat.com/errata/RHSA-2025:4560
secalert@redhathttps://access.redhat.com/errata/RHSA-2025:4568
secalert@redhathttps://access.redhat.com/errata/RHSA-2025:4609
secalert@redhathttps://access.redhat.com/errata/RHSA-2025:4624
secalert@redhathttps://access.redhat.com/errata/RHSA-2025:7436
secalert@redhathttps://access.redhat.com/security/cve/CVE-2025-46420
secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=2361963
secalert@redhathttps://gitlab.gnome.org/GNOME/libsoup/-/issues/438

Patch Availability(11)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	libsoup2.4-tests (2.74.3-6ubuntu1.3) @ noble	2026-05-21	ubuntu
ubuntu	libsoup-3.0-tests (3.6.0-2ubuntu0.3) @ oracular	2026-05-21	ubuntu
redhat	libsoup-0:2.72.0-10.el9_6.1	2025-05-13	redhat
redhat	libsoup-0:2.62.3-2.el8_4.4	2025-05-07	redhat
redhat	libsoup-0:2.62.3-2.el8_6.4	2025-05-07	redhat
redhat	libsoup-0:2.72.0-8.el9_2.4	2025-05-06	redhat
redhat	libsoup-0:2.62.3-8.el8_10	2025-05-06	redhat
redhat	libsoup-0:2.62.3-1.el8_2.4	2025-05-06	redhat
redhat	libsoup-0:2.62.3-3.el8_8.4	2025-05-06	redhat
redhat	libsoup-0:2.72.0-8.el9_0.4	2025-05-05	redhat
redhat	libsoup-0:2.72.0-8.el9_4.4	2025-05-05	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-401Missing Release of Memory after Effective Lifetime (Memory Leak)

All Vendor Advisories

(12)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 06:10 UTCepss_batch
2026-06-05 06:10 UTCepss_batch
2026-06-04 13:12 UTCepss_batch
2026-06-04 13:12 UTCepss_batch
2026-06-03 09:40 UTCOSV refresh
2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch

Frequently asked(5)

What is CVE-2025-46420?

CVE-2025-46420 is a medium vulnerability published on April 24, 2025. A flaw was found in libsoup. It is vulnerable to memory leaks in the soupheaderparsequalitylist() function when parsing a quality list that contains elements with all zeroes.

When was CVE-2025-46420 disclosed?

CVE-2025-46420 was first published in the National Vulnerability Database on April 24, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-46420 actively exploited?

CVE-2025-46420 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 65.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-46420?

CVE-2025-46420 has a CVSS v3 base score of 6.5 (NVD).

How do I remediate CVE-2025-46420?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-46420, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-46420

Published

Last Modified

References (12)

Patch Availability(11)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-46420?

Same vendor

Same CWE

CVE-2025-46420

📅 Published

🔄 Last Modified

🔗 References (12)

Patch Availability(11)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-46420?

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References (12)

Frequently asked(5)

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