CVE-2026-43894

MEDIUMNVD 6.26.2—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.2 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 95% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
6.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.2Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

jq is a command-line JSON processor. In 1.8.1 and earlier, when decNumberFromString is given a number literal of INT_MAX-1 (2147483646) digits, the D2U() macro overflows during signed-int arithmetic. The wrapped negative value bypasses the heap-allocation size check, causes the function to use a 30-byte stack buffer, and then writes ≈715 million 16-bit units (≈1.4 GiB) at an offset 1.43 GiB below the stack frame. The written content is fully attacker-controlled (the parsed decimal digits, packed 3-per-unit).

CVSS v3
6.2
EG Score
6.2MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100

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
Severity62% × 45%
Exploitation40% × 40%
Automatability0% × 15%
EPSS PROB
0.2%
EPSS %ILE
3rd
KEV
Not listed

Published

May 11, 2026

Last Modified

May 13, 2026

Advisory Details (1)

Auto-updated May 11, 2026
🔬 Proof of concept available. Patch available. Sources: github.
githubMentions a patch (unverified)🟡 PoC Available

Wild stack write via signed-integer overflow in decNumber D2U() macro · Advisory · jqlang/jq · GitHub

https://github.com/jqlang/jq/security/advisories/GHSA-5v7p-2r57-2g4g

Vendor Advisories for CVE-2026-43894(2)

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 / EcosystemFix (by version range) / PatchReleasedSource
redhatjq-main-1.8.2-0.1.hum12026-06-25redhat

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

(7 across 7 ecosystems)
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
jq—
  • every version up to 1.8.2-r0: fixed in 1.8.2-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
jq—
  • every version up to 1.8.2-r0: fixed in 1.8.2-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
jq—
  • every version up to 1.8.2-r0: fixed in 1.8.2-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
jq1.6-2.1, 1.6-2.1+deb11u1, 1.6-2.1+deb11u2
  • every version up to 1.6-2.1+deb11u3: fixed in 1.6-2.1+deb11u3
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
jq1.6-2.1, 1.6-2.1+deb12u1
  • every version up to 1.6-2.1+deb12u2: fixed in 1.6-2.1+deb12u2
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
jq1.7.1-6+deb13u1, 1.7.1-6+deb13u2
  • every version up to 1.7.1-6+deb13u3: fixed in 1.7.1-6+deb13u3
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
jq1.8.0-1 ... 1.8.1-5 (6 versions)
  • every version up to 1.8.1-6: fixed in 1.8.1-6
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 23× 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 173 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-43894?
CVE-2026-43894 is a medium vulnerability published on May 11, 2026. jq is a command-line JSON processor. In 1.8.1 and earlier, when decNumberFromString is given a number literal of INT_MAX-1 (2147483646) digits, the D2U() macro overflows during signed-int arithmetic. The wrapped negative value bypasses the heap-allocation size check, causes the function to use a…
When was CVE-2026-43894 disclosed?
CVE-2026-43894 was first published on May 11, 2026, with the most recent update on May 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43894 actively exploited?
CVE-2026-43894 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-43894?
CVE-2026-43894 has a CVSS v3 base score of 6.2 (NVD).
How do I remediate CVE-2026-43894?
A fix for CVE-2026-43894 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-43894 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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