CVE-2026-0990

MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence

Score 5.9 from GitHub Security Advisory published 2026-01-15. a secondary CVSS source baseline 5.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.9Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references itself. A remote attacker could exploit this configuration-dependent issue by providing a specially crafted XML catalog, leading to infinite recursion and call stack exhaustion. This ultimately results in a segmentation fault, causing a Denial of Service (DoS) by crashing affected applications.

CVSS v3
5.9
EG Score
5.9(medium)
EG Risk
27(Track)
EG Risk 27/100SSVC: 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
Severity59% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
55%
KEV
Not listed

Published

January 15, 2026

Last Modified

September 1, 2026

Advisory Details (4)

Auto-updated Jun 29, 2026
🔬 Proof of concept available. Patch available. Sources: redhat.
generic🟡 PoC Available

(CVE-2026-0990) Infinite recursion in xmlCatalogXMLResolveURI (#1018) · Issues · GNOME / libxml2 · GitLab

https://gitlab.gnome.org/GNOME/libxml2/-/issues/1018
redhat

2429959 – (CVE-2026-0990) CVE-2026-0990 libxml2: libxml2: Denial of Service via uncontrolled recursion in XML catalog processing

https://bugzilla.redhat.com/show_bug.cgi?id=2429959
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-0990
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:7519

Vendor Advisories for CVE-2026-0990(2)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntupython3-libxml2 (2.14.5+dfsg-0.2ubuntu0.1) @ questing2026-09-01ubuntu
redhatlibxml2-main-2.15.2-0.3.hum12026-04-10redhat

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:11(1)
PackageVulnerable rangeFixed inDependents
libxml22.9.10+dfsg-6.7 ... 2.9.10+dfsg-6.7+deb11u9 (10 versions)2.9.10+dfsg-6.7+deb11u10—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
libxml22.9.14+dfsg-1.2 ... 2.9.14+dfsg-1.3~deb12u5 (6 versions)2.9.14+dfsg-1.3~deb12u6—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
libxml22.12.7+dfsg+really2.9.14-2.1, 2.12.7+dfsg+really2.9.14-2.1+deb13u1, 2.12.7+dfsg+really2.9.14-2.1+deb13u22.12.7+dfsg+really2.9.14-2.1+deb13u3—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
libxml22.12.7+dfsg+really2.9.14-2.1 ... 2.15.1+dfsg-2 (25 versions)2.15.2+dfsg-0.1—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

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 18× in last 7d / 51× 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 170 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-0990?
CVE-2026-0990 is a medium vulnerability published on January 15, 2026. A flaw was found in libxml2, an XML parsing library. This uncontrolled recursion vulnerability occurs in the xmlCatalogXMLResolveURI function when an XML catalog contains a delegate URI entry that references itself. A remote attacker could exploit this configuration-dependent issue by providing a…
When was CVE-2026-0990 disclosed?
CVE-2026-0990 was first published in the National Vulnerability Database on January 15, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-0990 actively exploited?
CVE-2026-0990 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 44.6% of all scored CVEs.
What is the CVSS score of CVE-2026-0990?
CVE-2026-0990 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-0990?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-0990, 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-2026-0990

Explore →

Is Your Infrastructure Affected by CVE-2026-0990?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs