CVE-2025-59375

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2025-09-15. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:mitre, epss, ghsa
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
69%
KEV
Not listed

Published

September 15, 2025

Last Modified

July 14, 2026

Advisory Details (7)

Auto-updated May 1, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

oss-security - Prosody XMPP server security advisory 2026-04-31 (multiple vulnerabilities)

http://www.openwall.com/lists/oss-security/2026/05/01/5
generic

oss-security - libexpat 2.7.2 fixes CVE-2025-59375 (DoS, CWE-770)

http://www.openwall.com/lists/oss-security/2025/09/16/2
generic

OSS Fuzz

https://issues.oss-fuzz.com/issues/439133977
generic

[CVE-2025-59375] Start tracking and limiting use of dynamic memory (fixes #1018) by hartwork · Pull Request #1034 · libexpat/libexpat · GitHub

https://github.com/libexpat/libexpat/pull/1034
generic

[CVE-2025-59375] OSS-Fuzz/ClusterFuzz finding 439133977 · Issue #1018 · libexpat/libexpat · GitHub

https://github.com/libexpat/libexpat/issues/1018
generic

libexpat/expat/Changes at R_2_7_2 · libexpat/libexpat · GitHub

https://github.com/libexpat/libexpat/blob/R_2_7_2/expat/Changes
generic

libexpat/expat/Changes at 676a4c531ec768732fac215da9730b5f50fbd2bf · libexpat/libexpat · GitHub

https://github.com/libexpat/libexpat/blob/676a4c531ec768732fac215da9730b5f50fbd2bf/expat/Changes#L45-L74

Vendor Advisories for CVE-2025-59375(20)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatpython3.12-0:3.12.13-2.el9_82026-05-19redhat
redhatpython3.12-0:3.12.13-2.el10_22026-05-19redhat
redhatpython3.12-0:3.12.13-2.el8_102026-04-27redhat
redhatexpat-main-2.7.5-1.hum12026-03-23redhat
redhatrhaiis/vllm-rocm-rhel9:17721606252026-02-27redhat
redhatrhaiis/vllm-cuda-rhel9:17721605932026-02-27redhat
redhatmingw-fontconfig-0:2.12.6-4.el8_102026-02-26redhat
redhatrhcos-415.92.202601271320-02026-02-05redhat
redhatrhceph/rhceph-8-rhel9:17695123832026-02-02redhat
redhatrhcos-414.92.202601191325-02026-01-30redhat
redhatopenshift-serverless-1/logic-swf-devmode-rhel8:1.36.0-72026-01-22redhat
redhatrhcos-417.94.202601120213-02026-01-22redhat
redhatrhcos-4.19.9.6.202601130152-02026-01-22redhat
redhatrhcos-413.92.202601130113-02026-01-22redhat
redhatrhcos-416.94.202601071926-02026-01-15redhat
redhatrhcos-418.94.202601071817-02026-01-15redhat
redhatrhcos-412.86.202601061735-02026-01-15redhat
redhatrhcos-4.20.9.6.202601052146-02026-01-14redhat
redhatquay/quay-builder-rhel9:17679793552026-01-13redhat
redhatdiscovery/discovery-ui-rhel9:17679045732026-01-08redhat
redhatspice-client-win-0:8.10-3.el8_8.12026-01-05redhat
redhatspice-client-win-0:8.10-3.el8_2.12026-01-05redhat
redhatspice-client-win-0:8.10-3.el8_4.12026-01-05redhat
redhatspice-client-win-0:8.10-3.el8_6.12026-01-05redhat
redhatadvanced-cluster-security/rhacs-scanner-db-slim-rhel8:4.82025-12-17redhat
redhatrhaiis/vllm-rocm-rhel9:3.2.5-17655526032025-12-17redhat
redhatrhceph/rhceph-8-rhel9:82025-12-16redhat
redhatadvanced-cluster-security/rhacs-scanner-db-slim-rhel8:4.72025-12-16redhat
redhatrhaiis/vllm-tpu-rhel9:3.2.5-17655526192025-12-15redhat
redhatrhaiis/model-opt-cuda-rhel9:3.2.5-17653611842025-12-15redhat

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.

Affected Packages

(18 across 10 ecosystems)
Debian:11(3)
PackageVulnerable rangeFixed inDependents
expat2.2.10-2 ... 2.8.2-1~deb13u1 (47 versions)——
firefox-esr102.1.0esr-1 ... 91.9.1esr-1~deb9u1 (255 versions)140.9.0esr-1~deb11u1—
thunderbird1:102.0.1-1 ... 1:91.9.0-1~deb9u1 (306 versions)1:140.9.0esr-1~deb11u1—
Debian:12(3)
PackageVulnerable rangeFixed inDependents
expat2.5.0-1 ... 2.8.2-1~deb13u1 (25 versions)——
firefox-esr102.11.0esr-1 ... 140.8.0esr-1~deb13u1 (161 versions)140.9.0esr-1~deb12u1—
thunderbird1:102.11.0-1 ... 1:140.9.0esr-1~deb11u1 (191 versions)1:140.9.0esr-1~deb12u1—
Debian:13(3)
PackageVulnerable rangeFixed inDependents
expat2.7.1-2 ... 2.8.1-1 (9 versions)2.8.2-1~deb13u1—
firefox-esr128.13.0esr-1 ... 140.8.0esr-1~deb13u1 (36 versions)140.9.0esr-1~deb13u1—
thunderbird1:128.13.0esr-1 ... 1:140.9.0esr-1~deb11u1 (46 versions)1:140.9.0esr-1~deb13u1—
Debian:14(3)
PackageVulnerable rangeFixed inDependents
expat2.7.1-22.7.2-1—
firefox-esr128.13.0esr-1 ... 140.9.0esr-1~deb13u1 (39 versions)140.9.0esr-1—
thunderbird1:128.13.0esr-1 ... 1:140.9.0esr-1~deb13u1 (48 versions)1:140.9.0esr-1—
Alpine:v3.19(1)
PackageVulnerable rangeFixed inDependents
expat—2.7.2-r0—
Alpine:v3.20(1)
PackageVulnerable rangeFixed inDependents
expat—2.7.2-r0—
Alpine:v3.21(1)
PackageVulnerable rangeFixed inDependents
expat—2.7.2-r0—
Alpine:v3.22(1)
PackageVulnerable rangeFixed inDependents
expat—2.7.2-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
expat—2.7.2-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
expat—2.7.2-r0—

Weakness Classification(1)

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

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 33× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 158 total refreshes for this CVE.

  1. 2026-08-25 13:48 UTCEPSS rescore
  2. 2026-08-24 14:16 UTCEPSS rescore
  3. 2026-08-24 09:22 UTCEPSS rescore
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  1. 2026-08-04 10:37 UTCEPSS rescore
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  8. 2026-07-27 11:39 UTCOSV refresh
  9. 2026-07-26 14:54 UTCEPSS rescore
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  13. 2026-07-23 02:59 UTCEG score recompute
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  33. 2026-07-10 06:24 UTCOSV refresh
  34. 2026-07-09 19:09 UTCEPSS rescore
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Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2025-59375?
CVE-2025-59375 is a high vulnerability published on September 15, 2025. libexpat in Expat before 2.7.2 allows attackers to trigger large dynamic memory allocations via a small document that is submitted for parsing.
When was CVE-2025-59375 disclosed?
CVE-2025-59375 was first published in the National Vulnerability Database on September 15, 2025, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-59375 actively exploited?
CVE-2025-59375 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 31.4% of all scored CVEs.
What is the CVSS score of CVE-2025-59375?
CVE-2025-59375 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2025-59375?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-59375, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-59375

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