CVE-2026-32316

HIGHNVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.2 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 92% 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
8.2
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.2Exploit: NoneExposed: 0

A fix is available — apply it.

jq is a command-line JSON processor. An integer overflow vulnerability exists through version 1.8.1 within the jvp_string_append() and jvp_string_copy_replace_bad functions, where concatenating strings with a combined length exceeding 2^31 bytes causes a 32-bit unsigned integer overflow in the buffer allocation size calculation, resulting in a drastically undersized heap buffer. Subsequent memory copy operations then write the full string data into this undersized buffer, causing a heap buffer overflow classified as CWE-190 (Integer Overflow) leading to CWE-122 (Heap-based Buffer Overflow). Any system evaluating untrusted jq queries is affected, as an attacker can crash the process or potentially achieve further exploitation through heap corruption by crafting queries that produce extremely large strings. The root cause is the absence of string size bounds checking, unlike arrays and objects which already have size limits. The issue has been addressed in commit e47e56d226519635768e6aab2f38f0ab037c09e5.

CVSS v3
8.2
EG Score
8.2(medium)
EPSS
38.5%
KEV
Not listed

Published

April 13, 2026

Last Modified

April 22, 2026

Advisory Details (2)

Auto-updated May 4, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

Integer overflow in jvp_string_append and jvp_string_copy_replace_bad allows heap buffer overflow · Advisory · jqlang/jq · GitHub

https://github.com/jqlang/jq/security/advisories/GHSA-q3h9-m34w-h76f
generic

Fix heap buffer overflow in `jvp_string_append` and `jvp_string_copy_… · jqlang/jq@e47e56d · GitHub

https://github.com/jqlang/jq/commit/e47e56d226519635768e6aab2f38f0ab037c09e5

Vendor Advisories for CVE-2026-32316(2)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibjq1 (1.8.1-4ubuntu2) @ resolute2026-06-14ubuntu
ubuntujq (1.5+dfsg-1ubuntu0.1+esm4) @ xenial2026-06-14ubuntu
redhatjq-main-1.8.1-3.hum12026-04-16redhat

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

(2)

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 11× in last 7d / 41× 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 106 total refreshes for this CVE.

  1. 2026-07-16 17:03 UTCEPSS rescore
  2. 2026-07-16 17:03 UTCEPSS rescore
  3. 2026-07-15 16:57 UTCEPSS rescore
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  11. 2026-07-11 08:27 UTCEPSS rescore
  12. 2026-07-09 19:10 UTCEPSS rescore
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  25. 2026-06-28 04:56 UTCEPSS rescore
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  1. 2026-06-28 04:56 UTCEPSS rescore
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  3. 2026-06-25 13:49 UTCEPSS rescore
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  5. 2026-06-24 14:05 UTCEPSS rescore
  6. 2026-06-23 21:33 UTCEPSS rescore
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  19. 2026-06-15 17:49 UTCEPSS rescore
  20. 2026-06-14 23:18 UTCEPSS rescore
  21. 2026-06-14 21:43 UTCVendor advisory
  22. 2026-06-13 23:00 UTCEPSS rescore
  23. 2026-06-12 23:12 UTCEPSS rescore
  24. 2026-06-12 23:12 UTCEPSS rescore
  25. 2026-06-11 19:36 UTCVendor advisory
  26. 2026-06-11 14:00 UTCEPSS rescore
  27. 2026-06-10 22:18 UTCEPSS rescore
  28. 2026-06-10 13:22 UTCEPSS rescore
  29. 2026-06-10 12:34 UTCVendor advisory
  30. 2026-06-10 00:45 UTCVendor advisory
  31. 2026-06-09 11:12 UTCVendor advisory
  32. 2026-06-08 14:17 UTCEPSS rescore
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  34. 2026-06-08 07:00 UTCVendor advisory
  35. 2026-06-07 19:11 UTCVendor advisory
  36. 2026-06-07 15:25 UTCEPSS rescore
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  38. 2026-06-07 15:25 UTCEPSS rescore
  39. 2026-06-07 07:21 UTCVendor advisory
  40. 2026-06-06 13:47 UTCEPSS rescore
  41. 2026-06-06 13:47 UTCEPSS rescore
  42. 2026-06-05 22:47 UTCEPSS rescore
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  44. 2026-06-05 06:10 UTCEPSS rescore
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  46. 2026-06-04 13:12 UTCEPSS rescore
  47. 2026-06-04 13:12 UTCEPSS rescore
  48. 2026-06-02 20:13 UTCEPSS rescore
  49. 2026-06-02 19:13 UTCVendor advisory
  50. 2026-06-01 21:13 UTCVendor advisory
  51. 2026-06-01 13:51 UTCEPSS rescore
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  70. 2026-05-24 16:59 UTCEPSS rescore
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  73. 2026-05-20 22:38 UTCEPSS rescore
  74. 2026-05-20 22:38 UTCEPSS rescore
  75. 2026-05-20 22:37 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-32316?
CVE-2026-32316 is a high vulnerability published on April 13, 2026. jq is a command-line JSON processor. An integer overflow vulnerability exists through version 1.8.1 within the jvpstringappend() and jvpstringcopyreplacebad functions, where concatenating strings with a combined length exceeding 2^31 bytes causes a 32-bit unsigned integer overflow in the buffer…
When was CVE-2026-32316 disclosed?
CVE-2026-32316 was first published in the National Vulnerability Database on April 13, 2026, with the most recent update on April 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-32316 actively exploited?
CVE-2026-32316 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-32316?
CVE-2026-32316 has a CVSS v3 base score of 8.2 (NVD).
How do I remediate CVE-2026-32316?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-32316, 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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