CVE-2026-25896

CRITICALPre-NVD 9.39.3
EchelonGraph scoreMEDIUM confidence

“—” 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.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated

Also known asEUVD-2026-7529 (ENISA EUVD) · GHSA-m7jm-9gc2-mpf2 (GitHub Security Advisories)Source: ENISA EUVD

9.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.3Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
9.3
EG Score
9.3CRITICALmedium confidence
EG Risk
73
EG 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
45th
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 2026-11-12). 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, 2026
Patch available. Sources: github_release, github, redhat, github_commit.
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:6802
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:6174
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:51349
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:41944
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:41941
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:40984
GitHub advisoryMentions a patch (unverified)

Entity 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-mpf2
GitHub release Patch Available

v5.3.5

Patch available: NaturalIntelligence/fast-xml-parser v5.3.5

https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.3.5
GitHub commit Patch Available

commit 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/ddcd0acf26ddd682cb0dc15a2bd6aa3b96bb1e69
GitHub commit Patch Available

commit 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/943ef0eb1b2d3284e72dd74f44a042ee9f07026e
Red Hat

2441501 – (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=2441501
Red HatMentions a patch (unverified)

cve-details

https://access.redhat.com/security/cve/CVE-2026-25896
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:7128
Red HatMentions a patch (unverified)
https://access.redhat.com/errata/RHSA-2026:7110

Patch Availability(10)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatsatellite/iop-host-inventory-frontend-rhel9:17859227642026-08-06redhat
redhatodf4/rook-ceph-rhel9-operator:17836853752026-07-20redhat
redhatodf4/rook-ceph-rhel9-operator:17836775332026-07-20redhat
redhatodf4/rook-ceph-rhel9-operator:17836692192026-07-16redhat
redhatadvanced-cluster-security/rhacs-main-rhel8:17755942842026-04-08redhat
redhatadvanced-cluster-security/rhacs-main-rhel8:17755941192026-04-08redhat
redhatrhdh/rhdh-hub-rhel9:17751406472026-04-07redhat
redhatrhdh/rhdh-hub-rhel9:17745456052026-03-30redhat
npmfast-xml-parser @ 5.3.5 (fixes >= 5.0.0, < 5.3.5)—ghsa
npmfast-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)
PackageVulnerable rangeFix by version rangeDependents
node-webfont11.4.0+dfsg2+~cs35.7.26-10 ... 11.4.0+dfsg2+~cs35.7.26-9 (14 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
node-webfont11.4.0+dfsg2+~cs35.7.26-13 ... 11.4.0+dfsg2+~cs35.7.26-21 (8 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
node-webfont11.4.0+dfsg2+~cs35.7.26-13 ... 11.4.0+dfsg2+~cs35.7.26-21 (8 versions)
  • every version on: no fix on record
—
npm(1)
PackageVulnerable rangeFix by version rangeDependents
fast-xml-parser—
  • 5.0.0 up to 5.3.5: fixed in 5.3.5
  • 4.1.3 up to 4.5.4: fixed in 4.5.4
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 20× in last 7d / 74× 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 its CVE.org record (CNA or CISA ADP). 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). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 304 rows 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 204 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 22:34 UTCEchelonGraph re-scored
  2. 2026-11-12 22:34 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  3. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  4. 2026-11-11 22:53 UTCEchelonGraph re-scored
  5. 2026-11-11 22:53 UTCVendor advisory
  6. 2026-11-11 22:53 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  7. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  8. 2026-11-10 23:38 UTCEchelonGraph re-scored
  9. 2026-11-10 23:38 UTCVendor advisory
  10. 2026-11-10 23:38 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  11. 2026-11-10 16:43 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  12. 2026-11-10 00:24 UTCEchelonGraph re-scored
  13. 2026-11-10 00:24 UTCVendor advisory
  14. 2026-11-10 00:24 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  15. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  16. 2026-11-09 01:10 UTCEchelonGraph re-scored
  17. 2026-11-09 01:10 UTCVendor advisory
  18. 2026-11-09 01:10 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  19. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  20. 2026-11-08 01:52 UTCEchelonGraph re-scored
  21. 2026-11-08 01:52 UTCVendor advisory
  22. 2026-11-08 01:52 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  23. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  24. 2026-11-07 02:37 UTCEchelonGraph re-scored
  25. 2026-11-07 02:37 UTCVendor advisory
Show 75 more
  1. 2026-11-07 02:37 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  2. 2026-11-06 16:37 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  3. 2026-11-06 03:55 UTCOSV refresh
  4. 2026-11-06 03:23 UTCEchelonGraph re-scored
  5. 2026-11-06 03:23 UTCVendor advisory
  6. 2026-11-06 03:23 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  7. 2026-11-05 16:37 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  8. 2026-11-05 04:08 UTCEchelonGraph re-scored
  9. 2026-11-05 04:08 UTCVendor advisory
  10. 2026-11-05 04:08 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  11. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  12. 2026-11-04 04:51 UTCEchelonGraph re-scored
  13. 2026-11-04 04:51 UTCVendor advisory
  14. 2026-11-04 04:51 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  15. 2026-11-03 16:47 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  16. 2026-11-03 05:35 UTCEchelonGraph re-scored
  17. 2026-11-03 05:35 UTCVendor advisory
  18. 2026-11-03 05:35 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  19. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  20. 2026-11-02 06:21 UTCEchelonGraph re-scored
  21. 2026-11-02 06:21 UTCVendor advisory
  22. 2026-11-02 06:21 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  23. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  24. 2026-11-01 07:56 UTCGHSA enrichmentGHSA-m7jm-9gc2-mpf2 · GitHub severity CRITICAL · GitHub CVSS 9.3
  25. 2026-11-01 07:56 UTCEchelonGraph re-scored
  26. 2026-11-01 07:07 UTCEchelonGraph re-scored
  27. 2026-11-01 07:07 UTCVendor advisory
  28. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  29. 2026-10-31 07:50 UTCEchelonGraph re-scored
  30. 2026-10-31 07:50 UTCVendor advisory
  31. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  32. 2026-10-30 08:35 UTCEchelonGraph re-scored
  33. 2026-10-30 08:35 UTCVendor advisory
  34. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  35. 2026-10-29 09:21 UTCEchelonGraph re-scored
  36. 2026-10-29 09:21 UTCVendor advisory
  37. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  38. 2026-10-28 10:07 UTCEchelonGraph re-scored
  39. 2026-10-28 10:07 UTCVendor advisory
  40. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  41. 2026-10-27 09:57 UTCEchelonGraph re-scored
  42. 2026-10-27 09:57 UTCVendor advisory
  43. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  44. 2026-10-26 10:43 UTCEchelonGraph re-scored
  45. 2026-10-26 10:43 UTCVendor advisory
  46. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  47. 2026-10-25 14:39 UTCEchelonGraph re-scored
  48. 2026-10-25 11:28 UTCEchelonGraph re-scored
  49. 2026-10-25 11:28 UTCVendor advisory
  50. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  51. 2026-10-24 12:13 UTCEchelonGraph re-scored
  52. 2026-10-24 12:13 UTCVendor advisory
  53. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  54. 2026-10-23 12:58 UTCEchelonGraph re-scored
  55. 2026-10-23 12:58 UTCVendor advisory
  56. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  57. 2026-10-22 13:42 UTCEchelonGraph re-scored
  58. 2026-10-22 13:42 UTCVendor advisory
  59. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  60. 2026-10-21 14:28 UTCEchelonGraph re-scored
  61. 2026-10-21 14:28 UTCVendor advisory
  62. 2026-10-20 16:32 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  63. 2026-10-20 14:36 UTCEchelonGraph re-scored
  64. 2026-10-20 14:36 UTCVendor advisory
  65. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  66. 2026-10-19 13:41 UTCEchelonGraph re-scored
  67. 2026-10-19 13:41 UTCVendor advisory
  68. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.6% · 46th percentile
  69. 2026-10-18 13:42 UTCVendor advisory
  70. 2026-10-18 03:52 UTCEchelonGraph re-scored
  71. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  72. 2026-10-17 14:25 UTCEchelonGraph re-scored
  73. 2026-10-17 14:25 UTCVendor advisory
  74. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  75. 2026-10-16 15:09 UTCEchelonGraph re-scored

Frequently asked(5)

What is CVE-2026-25896?
CVE-2026-25896 is a critical-severity vulnerability; its CVE record was published on February 20, 2026. 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…
When was the CVE record for CVE-2026-25896 published?
The CVE record for CVE-2026-25896 was published on February 20, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 10, 2026; the record at its source may have been updated since.
Is CVE-2026-25896 actively exploited?
CVE-2026-25896 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-25896?
CVE-2026-25896 has a CVSS base score of 9.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-25896?
A fix for CVE-2026-25896 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-25896 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-25896

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