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
Trending — 4 sources updated this weekElevated

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
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, 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 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.

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

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 (44th 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

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