CVE-2025-49794

CRITICALPre-NVD 9.19.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2025-06-16. A secondary CVSS source baseline 9.1; 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 week
9.1EG
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).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the program's crash using libxml or other possible undefined behaviors.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
56
EG Risk 56/100

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)
Severity91% × 45%
Impact severity (EG Severity): CVSS 9.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.8% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
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 none (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
0.8%
EPSS %ILE
56th
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 (9.1): severity, escalated by confirmed exploitation. This CVE's 9.1 is its impact severity (EG Severity), not escalated.

EG Severity
9.1 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-18). 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: 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 none (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.

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

June 16, 2025

Last Modified

October 12, 2026

Advisory Details (10)

Auto-updated Sep 15, 2026
Patch available. Sources: redhat.
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 7 Extended Lifecycle Support.

https://access.redhat.com/errata/RHSA-2025:12240
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Serv

https://access.redhat.com/errata/RHSA-2025:12239
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 8.2 Advanced Update Support.

https://access.redhat.com/errata/RHSA-2025:12237
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2025:12199
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

https://access.redhat.com/errata/RHSA-2025:12099
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP So

https://access.redhat.com/errata/RHSA-2025:12098
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.4 Extended Update Support.

https://access.redhat.com/errata/RHSA-2025:11580
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2025:10699
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 8.

https://access.redhat.com/errata/RHSA-2025:10698
Red HatMentions a patch (unverified)

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2025:10630

Patch Availability(29)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntupython-libxml2 (2.9.1+dfsg1-3ubuntu4.13+esm8) @ trusty2026-10-19ubuntu
redhatopenshift/ose-rhel-coreos-9:415.92.202609140326-02026-09-28redhat
redhatopenshift/ose-rhel-coreos-9:416.94.202609011112-02026-09-10redhat
redhatlibxml2-main-2.15.2-0.3.hum12026-04-10redhat
redhatopenshift-serverless-1/logic-swf-devmode-rhel8:1.36.0-72026-01-22redhat
redhatcompliance/openshift-file-integrity-rhel8-operator:v1.32025-11-21redhat
redhatopenshift/ose-rhel-coreos-8:412.86.202510291903-02025-11-13redhat
redhatopenshift/ose-rhel-coreos-9:414.92.202510211419-02025-10-30redhat
redhatopenshift/ose-rhel-coreos-9:418.94.202510230424-02025-10-29redhat
redhatlibxml22025-10-27redhat
redhatopenshift/ose-rhel-coreos-9:413.92.202510150118-02025-10-23redhat
redhatopenshift/ose-rhel-coreos-9:4.19.9.6.202510140714-02025-10-22redhat
redhatopenshift/ose-rhel-coreos-9:417.94.202510112152-02025-10-22redhat
redhatopenshift/ose-rhel-coreos-9:4.20.9.6.202509251656-02025-10-21redhat
redhatcert-manager/jetstack-cert-manager-rhel9:v1.16.5-17605157572025-10-16redhat
redhatweb-terminal/web-terminal-tooling-rhel9:1.12-42025-09-15redhat
redhatweb-terminal/web-terminal-tooling-rhel9:1.11-82025-09-15redhat
redhatinsights-proxy/insights-proxy-container-rhel9:1.5.5-17545043432025-08-07redhat
redhatlibxml2-0:2.9.7-16.el8_8.92025-07-30redhat
redhatlibxml2-0:2.9.1-6.el7_9.102025-07-30redhat
redhatlibxml2-0:2.9.7-9.el8_4.62025-07-30redhat
redhatlibxml2-0:2.9.7-9.el8_2.32025-07-30redhat
redhatlibxml2-0:2.9.7-13.el8_6.102025-07-29redhat
redhatlibxml2-0:2.9.13-3.el9_2.72025-07-29redhat
redhatlibxml2-0:2.9.13-1.el9_0.52025-07-29redhat
redhatlibxml2-0:2.9.13-10.el9_42025-07-23redhat
redhatlibxml2-0:2.9.13-10.el9_62025-07-09redhat
redhatlibxml2-0:2.9.7-21.el8_10.12025-07-09redhat
redhatlibxml2-0:2.12.5-7.el10_02025-07-08redhat

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

(8 across 8 ecosystems)
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
libxml2—
  • every version up to 2.13.9-r0: fixed in 2.13.9-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
libxml2—
  • every version up to 2.13.9-r0: fixed in 2.13.9-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
libxml2—
  • every version up to 2.13.9-r0: fixed in 2.13.9-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
libxml2—
  • every version up to 2.13.9-r0: fixed in 2.13.9-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
libxml22.9.10+dfsg-6.7 ... 2.9.10+dfsg-6.7+deb11u7 (8 versions)
  • every version up to 2.9.10+dfsg-6.7+deb11u8: fixed in 2.9.10+dfsg-6.7+deb11u8
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
libxml22.9.14+dfsg-1.2, 2.9.14+dfsg-1.3~deb12u1, 2.9.14+dfsg-1.3~deb12u2
  • every version up to 2.9.14+dfsg-1.3~deb12u3: fixed in 2.9.14+dfsg-1.3~deb12u3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
libxml2—
  • every version up to 2.12.7+dfsg+really2.9.14-2: fixed in 2.12.7+dfsg+really2.9.14-2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
libxml2—
  • every version up to 2.12.7+dfsg+really2.9.14-2: fixed in 2.12.7+dfsg+really2.9.14-2
—

Weakness Classification(1)

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

Additional Vendor Advisories

(9)

Data Freshness Timeline

(refreshed 25× in last 7d / 69× 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 95 of 346 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. 5 repeat rows among the latest 100 are merged into the row they repeat. The 251 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  2. 2026-10-19 12:25 UTCEG score recompute
  3. 2026-10-19 12:25 UTCVendor advisory
  4. 2026-10-19 12:25 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  5. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  6. 2026-10-18 10:40 UTCVendor advisory
  7. 2026-10-18 10:40 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  8. 2026-10-18 05:29 UTCEG score recompute
  9. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  10. 2026-10-17 06:57 UTCEG score recompute
  11. 2026-10-17 06:57 UTCVendor advisory
  12. 2026-10-17 06:57 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  13. 2026-10-16 16:38 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  14. 2026-10-16 05:51 UTCEG score recompute
  15. 2026-10-16 05:51 UTCVendor advisory
  16. 2026-10-16 05:51 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  17. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  18. 2026-10-15 04:22 UTCEG score recompute
  19. 2026-10-15 04:22 UTCVendor advisory
  20. 2026-10-15 04:22 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  21. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  22. 2026-10-14 00:19 UTCEG score recompute
  23. 2026-10-14 00:19 UTCVendor advisory
  24. 2026-10-14 00:19 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  25. 2026-10-13 16:32 UTCEPSS rescoreEPSS 0.8% · 56th percentile
Show 70 more
  1. 2026-10-12 20:26 UTCEG score recompute
  2. 2026-10-12 20:26 UTCVendor advisory
  3. 2026-10-12 20:26 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  4. 2026-10-12 19:47 UTCEG score recompute
  5. 2026-10-12 19:47 UTCVendor advisory
  6. 2026-10-12 19:47 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  7. 2026-10-12 17:00 UTCEG score recompute
  8. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  9. 2026-10-12 11:02 UTCVendor advisory
  10. 2026-10-12 11:01 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  11. 2026-10-11 20:33 UTCEG score recompute
  12. 2026-10-11 18:45 UTCEG score recompute
  13. 2026-10-11 15:20 UTCEG score recompute
  14. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  15. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  16. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  17. 2026-10-08 21:21 UTCEG score recompute
  18. 2026-10-08 21:21 UTCVendor advisory
  19. 2026-10-08 21:21 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  20. 2026-10-08 21:04 UTCEG score recompute
  21. 2026-10-08 21:04 UTCVendor advisory
  22. 2026-10-08 21:03 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  23. 2026-10-08 17:10 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  24. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  25. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  26. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  27. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  28. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  29. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  30. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  31. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  32. 2026-09-28 02:19 UTCEG score recompute
  33. 2026-09-28 02:19 UTCVendor advisory
  34. 2026-09-28 02:19 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  35. 2026-09-28 02:12 UTCEG score recompute
  36. 2026-09-28 02:12 UTCVendor advisory
  37. 2026-09-28 02:12 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  38. 2026-09-27 13:45 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  39. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  40. 2026-09-26 00:25 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  41. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  42. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  43. 2026-09-21 21:06 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  44. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  45. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  46. 2026-09-18 18:33 UTCEG score recompute
  47. 2026-09-18 18:33 UTCVendor advisory
  48. 2026-09-18 18:33 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  49. 2026-09-18 17:30 UTCEG score recompute
  50. 2026-09-18 17:30 UTCVendor advisory
  51. 2026-09-18 17:30 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  52. 2026-09-17 19:29 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  53. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.8% · 54th percentile
  54. 2026-09-15 03:09 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  55. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  56. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  57. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  58. 2026-09-10 10:38 UTCEG score recompute
  59. 2026-09-10 10:38 UTCVendor advisory
  60. 2026-09-10 10:38 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  61. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  62. 2026-09-10 09:32 UTCEG score recompute
  63. 2026-09-10 09:32 UTCVendor advisory
  64. 2026-09-10 09:32 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1
  65. 2026-09-08 21:59 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  66. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  67. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  68. 2026-09-06 04:25 UTCEG score recompute
  69. 2026-09-06 04:25 UTCVendor advisory
  70. 2026-09-06 04:25 UTCGHSA enrichmentGHSA-qg4c-8pj4-qgw2 · GitHub severity CRITICAL · GitHub CVSS 9.1

Frequently asked(5)

What is CVE-2025-49794?
CVE-2025-49794 is a critical-severity vulnerability; its CVE record was published on June 16, 2025. A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the <sch:name path="..."/> schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml,…
When was CVE-2025-49794 made public?
CVE-2025-49794 was made public on June 10, 2025: that is the date its CVE record's CNA, Red Hat, Inc., gives for when the vulnerability was made public. The CVE record itself was published on June 16, 2025. EchelonGraph's copy of the record carries a last-modified date of October 12, 2026; the record at its source may have been updated since.
Is CVE-2025-49794 actively exploited?
CVE-2025-49794 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-49794?
CVE-2025-49794 has a CVSS base score of 9.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-49794?
A fix for CVE-2025-49794 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-49794 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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