fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. From 4.1.3to before 5.3.5, a dot (.) in a DOCTYPE entity name is treated as a regex wildcard during entity replacement, allowing an attacker to shadow built-in XML entities (<, >, &, ", ') with arbitrary values. This bypasses entity encoding and leads to XSS when parsed output is rendered. This vulnerability is fixed in 5.3.5.
CVE-2026-25896
“—” beside the score: it is equal to the CVSS score beside it.
Score 9.3 from GitHub Security Advisory (severity: CRITICAL) published 2026-02-20. A secondary CVSS source baseline 9.3; sources differ by 0.0.
Also known asEUVD-2026-7529 (ENISA EUVD) · GHSA-m7jm-9gc2-mpf2 (GitHub Security Advisories)Source: ENISA EUVD
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
A fix is available — apply it.
- CVSS v3
- 9.3
- EG Score
- 9.3CRITICALmedium confidence
- EG Risk
- 73EG Risk 73/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity93% × 45%Impact severity (EG Severity): CVSS 9.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.5%
- EPSS %ILE
- 44th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (9.3): severity, escalated by confirmed exploitation. This CVE's 9.3 is its impact severity (EG Severity), not escalated.
- EG Severity
- 9.3 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-01). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
February 20, 2026
Last Modified
September 10, 2026
Advisory Details (14)
Auto-updated Oct 3, 2026Entity encoding bypass via regex injection in DOCTYPE entity names · Advisory · NaturalIntelligence/fast-xml-parser · GitHub
https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-m7jm-9gc2-mpf2v5.3.5
Patch available: NaturalIntelligence/fast-xml-parser v5.3.5
https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.3.5commit ddcd0acf26dd (NaturalIntelligence/fast-xml-parser)
Patch available: NaturalIntelligence/fast-xml-parser v5.3.5 (contains commit ddcd0acf26dd)
https://github.com/NaturalIntelligence/fast-xml-parser/commit/ddcd0acf26ddd682cb0dc15a2bd6aa3b96bb1e69commit 943ef0eb1b2d (NaturalIntelligence/fast-xml-parser)
Patch available: NaturalIntelligence/fast-xml-parser v5.3.5 (contains commit 943ef0eb1b2d)
https://github.com/NaturalIntelligence/fast-xml-parser/commit/943ef0eb1b2d3284e72dd74f44a042ee9f07026e2441501 – (CVE-2026-25896) CVE-2026-25896 fast-xml-parser: fast-xml-parser: Cross-Site Scripting (XSS) due to improper DOCTYPE entity handling
https://bugzilla.redhat.com/show_bug.cgi?id=2441501cve-details
https://access.redhat.com/security/cve/CVE-2026-25896Vendor Advisories for CVE-2026-25896(8)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:51349Red Hat Product SecurityHigh
Red Hat Security Advisory: General availability of the satellite/iop-host-inventory-frontend-rhel9 container image
- RHSA-2026:41944Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.19.20 security, enhancement & bug fix update
- RHSA-2026:41941Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.18.25 security, enhancement & bug fix update
- RHSA-2026:40984Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.20.15 security, enhancement & bug fix update
- RHSA-2026:7128Red Hat Product SecurityHigh
Red Hat Security Advisory: RHACS 4.9.5 security and bug fix update
- RHSA-2026:7110Red Hat Product SecurityHigh
Red Hat Security Advisory: RHACS 4.8.10 security and bug fix update
- RHSA-2026:6802Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Developer Hub 1.9.3 release.
- RHSA-2026:6174Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Developer Hub 1.8.5 release.
Patch Availability(10)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | satellite/iop-host-inventory-frontend-rhel9:1785922764 | 2026-08-06 | redhat |
| redhat | odf4/rook-ceph-rhel9-operator:1783685375 | 2026-07-20 | redhat |
| redhat | odf4/rook-ceph-rhel9-operator:1783677533 | 2026-07-20 | redhat |
| redhat | odf4/rook-ceph-rhel9-operator:1783669219 | 2026-07-16 | redhat |
| redhat | advanced-cluster-security/rhacs-main-rhel8:1775594284 | 2026-04-08 | redhat |
| redhat | advanced-cluster-security/rhacs-main-rhel8:1775594119 | 2026-04-08 | redhat |
| redhat | rhdh/rhdh-hub-rhel9:1775140647 | 2026-04-07 | redhat |
| redhat | rhdh/rhdh-hub-rhel9:1774545605 | 2026-03-30 | redhat |
| npm | fast-xml-parser @ 5.3.5 (fixes >= 5.0.0, < 5.3.5) | — | ghsa |
| npm | fast-xml-parser @ 4.5.4 (fixes >= 4.1.3, < 4.5.4) | — | ghsa |
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
(4 across 4 ecosystems)
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-webfont | 11.4.0+dfsg2+~cs35.7.26-10 ... 11.4.0+dfsg2+~cs35.7.26-9 (14 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-webfont | 11.4.0+dfsg2+~cs35.7.26-13 ... 11.4.0+dfsg2+~cs35.7.26-21 (8 versions) |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| node-webfont | 11.4.0+dfsg2+~cs35.7.26-13 ... 11.4.0+dfsg2+~cs35.7.26-21 (8 versions) |
| — |
npm(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| fast-xml-parser | — |
| — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 24× in last 7d / 81× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 100 of 260 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 160 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-02 06:21 UTCEG score recompute
- 2026-11-02 06:21 UTCVendor advisory
- 2026-11-02 06:21 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
- 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
- 2026-11-01 07:56 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
- 2026-11-01 07:56 UTCEG score recompute
- 2026-11-01 07:07 UTCEG score recompute
- 2026-11-01 07:07 UTCVendor advisory
- 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
- 2026-10-31 07:50 UTCEG score recompute
- 2026-10-31 07:50 UTCVendor advisory
- 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
- 2026-10-30 08:35 UTCEG score recompute
- 2026-10-30 08:35 UTCVendor advisory
- 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
- 2026-10-29 09:21 UTCEG score recompute
- 2026-10-29 09:21 UTCVendor advisory
- 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
- 2026-10-28 10:07 UTCEG score recompute
- 2026-10-28 10:07 UTCVendor advisory
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
- 2026-10-27 09:57 UTCEG score recompute
- 2026-10-27 09:57 UTCVendor advisory
- 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
- 2026-10-26 10:43 UTCEG score recompute
Show 75 moreShow fewer
- 2026-10-26 10:43 UTCVendor advisory
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
- 2026-10-25 14:39 UTCEG score recompute
- 2026-10-25 11:28 UTCEG score recompute
- 2026-10-25 11:28 UTCVendor advisory
- 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-24 12:13 UTCEG score recompute
- 2026-10-24 12:13 UTCVendor advisory
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-23 12:58 UTCEG score recompute
- 2026-10-23 12:58 UTCVendor advisory
- 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-22 13:42 UTCEG score recompute
- 2026-10-22 13:42 UTCVendor advisory
- 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-21 14:28 UTCEG score recompute
- 2026-10-21 14:28 UTCVendor advisory
- 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-20 14:36 UTCEG score recompute
- 2026-10-20 14:36 UTCVendor advisory
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-19 13:41 UTCEG score recompute
- 2026-10-19 13:41 UTCVendor advisory
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
- 2026-10-18 13:42 UTCVendor advisory
- 2026-10-18 03:52 UTCEG score recompute
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-17 14:25 UTCEG score recompute
- 2026-10-17 14:25 UTCVendor advisory
- 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-16 15:09 UTCEG score recompute
- 2026-10-16 15:09 UTCVendor advisory
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
- 2026-10-15 15:51 UTCEG score recompute
- 2026-10-15 15:51 UTCVendor advisory
- 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-14 10:02 UTCEG score recompute
- 2026-10-14 10:02 UTCVendor advisory
- 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-13 08:13 UTCEG score recompute
- 2026-10-13 08:13 UTCVendor advisory
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-12 16:18 UTCEG score recompute
- 2026-10-12 08:58 UTCVendor advisory
- 2026-10-11 20:01 UTCEG score recompute
- 2026-10-11 17:14 UTCEG score recompute
- 2026-10-11 14:45 UTCEG score recompute
- 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 41st percentile
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-09-29 19:32 UTCOSV refresh
- 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.5% · 40th percentile
- 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.5% · 39th percentile
- 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-10 13:23 UTCEG score recompute
- 2026-09-10 13:23 UTCVendor advisory
- 2026-09-10 12:28 UTCEG score recompute
- 2026-09-10 12:28 UTCVendor advisory
- 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
- 2026-09-09 12:41 UTCEG score recompute
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:12:node-webfont · npm:fast-xml-parser
Same vendor
10 shownredhat:RHSA-2026:40984
Frequently asked(5)
What is CVE-2026-25896?
When was the CVE record for CVE-2026-25896 published?
Is CVE-2026-25896 actively exploited?
What is the CVSS score of CVE-2026-25896?
How do I remediate CVE-2026-25896?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-25896
Is Your Infrastructure Affected by CVE-2026-25896?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.