CVE-2019-15903

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-24. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 7%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply it.

In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XML_GetCurrentLineNumber (or XML_GetCurrentColumnNumber) then resulted in a heap-based buffer over-read.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
93.1%
KEV
Not listed

Published

September 4, 2019

Last Modified

May 30, 2025

References (118)

Vendor Advisories for CVE-2019-15903(2)

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

Patch Availability(19)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuxul-ext-lightning (1:68.2.1+build1-0ubuntu0.18.04.1) @ bionic2026-05-27ubuntu
ubuntuxul-ext-lightning (1:68.7.0+build1-0ubuntu0.16.04.2) @ xenial2026-05-27ubuntu
ubuntulibexpat1-udeb (2.1.0-7ubuntu0.16.04.5) @ xenial2026-05-27ubuntu
ubuntufirefox-mozsymbols (70.0+build2-0ubuntu0.16.04.1) @ xenial2026-05-27ubuntu
ubuntutcl-vtk (5.10.1+dfsg-2.1ubuntu0.1~esm1) @ xenial2026-05-27ubuntu
ubuntulib64expat1 (2.1.0-4ubuntu1.4+esm2) @ trusty2026-05-27ubuntu
ubuntulibxmltok1-dev (1.2-3ubuntu0.16.04.1~esm2) @ xenial2026-05-27ubuntu
ubuntulibxmltok1t64 (1.2-4.1ubuntu3.1) @ oracular2026-05-27ubuntu
redhatexpat-0:2.2.10-1.el8_22025-12-09redhat
redhatopenshiftdo/odo-init-image-rhel7:1.1.3-22021-03-22redhat
redhatexpat-0:2.2.5-4.el82020-11-04redhat
redhatexpat-0:2.1.0-12.el72020-09-29redhat
redhatjbcs-httpd24-openssl-pkcs11-0:0.4.10-7.jbcs.el72020-06-22redhat
redhatexpat2020-06-22redhat
redhatthunderbird-0:68.2.0-2.el6_102019-11-06redhat
redhatthunderbird-0:68.2.0-1.el7_72019-10-29redhat
redhatthunderbird-0:68.2.0-1.el8_02019-10-29redhat
redhatfirefox-0:68.2.0-2.el8_02019-10-24redhat
redhatfirefox-0:68.2.0-1.el7_72019-10-24redhat

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.

Weakness Classification(2)

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

Additional Vendor Advisories

(18)

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 7× in last 7d / 45× 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.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2019-15903?
CVE-2019-15903 is a high vulnerability published on September 4, 2019. In libexpat before 2.2.8, crafted XML input could fool the parser into changing from DTD parsing to document parsing too early; a consecutive call to XMLGetCurrentLineNumber (or XMLGetCurrentColumnNumber) then resulted in a heap-based buffer over-read.
When was CVE-2019-15903 disclosed?
CVE-2019-15903 was first published in the National Vulnerability Database on September 4, 2019, with the most recent update on May 30, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2019-15903 actively exploited?
CVE-2019-15903 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 93.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2019-15903?
CVE-2019-15903 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2019-15903?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-15903, 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

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