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No exploitation reportedFix available

CVE-2022-1276

No exploitation reported by the sources we read.

  • Published2022-04-10
  • Fixed in3.2
  • WeaknessCWE-125

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Out-of-bounds Read in mrb_get_args in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

Timeline

dates in UTC
  1. 2022-04-1010:15CVE publishedNVD

Versions per branch

NVD
Mruby
BranchAffectedFixed in
3.2< 3.23.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • mrubyUbuntu:26.10all versions · no fixed version listed
  • mrubyUbuntu:26.04:LTSall versions · no fixed version listed
  • mrubyUbuntu:25.10all versions · no fixed version listed
  • mrubyUbuntu:24.04:LTSall versions · no fixed version listed
  • mrubyUbuntu:22.04:LTSall versions · no fixed version listed
  • mrubyUbuntu:20.04:LTSall versions · no fixed version listed
  • mrubyUbuntu:18.04:LTSall versions · no fixed version listed
  • mrubyUbuntu:16.04:LTSall versions · no fixed version listed

1 more package range on OSV.dev

Full record on NVD

Fix

  1. Update Mruby to 3.2

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVSS 3.19.8read 2026-10-23
  • CNACVSS 3.08.4known since 2026-10-23
  • NVDCVSS 2.07.5read 2026-10-23
  • CNAweakness (CWE)CWE-125known since 2026-10-23
  • FIRST EPSSEPSS score1.6 %2026-11-08
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-04-10
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-66hc-pc5r-hwjr

Frequently asked questions

What is CVE-2022-1276?

Out-of-bounds Read in mrb_get_args in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

Is CVE-2022-1276 actively exploited?

Active exploitation of CVE-2022-1276 has not been confirmed. Its EPSS score was 1.6% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-1276?

CVE-2022-1276 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record