CVE-2026-42371

MEDIUMNVD 5.15.1—
EchelonGraph scoreMEDIUM confidence

Score 5.1 from GitHub Security Advisory published 2026-04-27. NVD baseline CVSS 5.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.1Exploit: None knownExposed: 0

A fix is available — apply it.

uriparser before 1.0.1 has numeric truncation in text range comparison, if an application accepts URIs with a length in gigabytes.

CVSS v3
5.1
EG Score
5.1(medium)
EG Risk
23(Track)
EG Risk 23/100SSVC: 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
Severity51% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
7%
KEV
Not listed

Published

April 27, 2026

Last Modified

May 18, 2026

Advisory Details (3)

Auto-updated Aug 3, 2026
Patch available. Sources: github_pr.
generic

oss-security - uriparser 1.0.1 fixes CVE-2026-42371 (integer overflow)

http://www.openwall.com/lists/oss-security/2026/04/27/2
generic

Welcome to uriparser! | uriparser

https://uriparser.github.io
github_pr Patch Available

[CVE-2026-42371] Fix range-length truncation in `CompareRange`

Patch available: uriparser/uriparser uriparser-1.0.1 (PR #298 merged 2026-04-27)

https://github.com/uriparser/uriparser/pull/298

Vendor Advisories for CVE-2026-42371(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
redhaturiparser-main-1.0.1-1.hum12026-04-30redhat

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
uriparser0.9.4+dfsg-1 ... 1.0.1+dfsg-1 (10 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
uriparser0.9.7+dfsg-2, 0.9.8+dfsg-1, 0.9.8+dfsg-2, 1.0.1+dfsg-1——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
uriparser0.9.8+dfsg-2, 1.0.1+dfsg-1——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
uriparser0.9.8+dfsg-21.0.1+dfsg-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 69× 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 177 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-42371?
CVE-2026-42371 is a medium vulnerability published on April 27, 2026. uriparser before 1.0.1 has numeric truncation in text range comparison, if an application accepts URIs with a length in gigabytes.
When was CVE-2026-42371 disclosed?
CVE-2026-42371 was first published in the National Vulnerability Database on April 27, 2026, with the most recent update on May 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42371 actively exploited?
CVE-2026-42371 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.3% of all scored CVEs.
What is the CVSS score of CVE-2026-42371?
CVE-2026-42371 has a CVSS v3 base score of 5.1 (NVD).
How do I remediate CVE-2026-42371?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42371, 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.

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