Vulnerability-Lookup

GHSA-XJ69-M9QQ-8M94

Vulnerability from github – Published: 2026-03-11 00:38 – Updated: 2026-03-11 21:37

Summary

Quill has unbounded memory allocation via unvalidated size fields in Mach-O binary parsing

Details

Impact

Quill before version v0.7.1 contains an unbounded memory allocation vulnerability when parsing Mach-O binaries. Exploitation requires that Quill processes an attacker-supplied Mach-O binary, which is most likely in environments such as CI/CD pipelines, shared signing services, or any workflow where externally-submitted binaries are accepted for signing.

When parsing a Mach-O binary, Quill reads several size and count fields from the LC_CODE_SIGNATURE load command and embedded code signing structures (SuperBlob, BlobIndex) and uses them to allocate memory buffers without validating that the values are reasonable or consistent with the actual file size. Affected fields include DataSize, DataOffset, and Size from the load command, Count from the SuperBlob header, and Length from individual blob headers. An attacker can craft a minimal (~4KB) malicious Mach-O binary with extremely large values in these fields, causing Quill to attempt to allocate excessive memory. This leads to memory exhaustion and denial of service, potentially crashing the host process. Both the Quill CLI and Go library are affected when used to parse untrusted Mach-O files.

Patches

Fixed in Quill v0.7.1

Workarounds

None

Credit

Anchore would like to thank opera-aklajn (Opera) for reporting this vulnerability

Resources

Inside code signing: hashes (Apple documentation)

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/anchore/quill"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.7.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-31961"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-11T00:38:00Z",
    "nvd_published_at": "2026-03-11T20:16:17Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nQuill before version `v0.7.1` contains an unbounded memory allocation vulnerability when parsing Mach-O binaries. Exploitation requires that Quill processes an attacker-supplied Mach-O binary, which is most likely in environments such as CI/CD pipelines, shared signing services, or any workflow where externally-submitted binaries are accepted for signing.\n\nWhen parsing a Mach-O binary, Quill reads several size and count fields from the `LC_CODE_SIGNATURE` load command and embedded code signing structures (`SuperBlob`, `BlobIndex`) and uses them to allocate memory buffers without validating that the values are reasonable or consistent with the actual file size. Affected fields include `DataSize`, `DataOffset`, and `Size` from the load command, `Count` from the `SuperBlob` header, and `Length` from individual blob headers. An attacker can craft a minimal (~4KB) malicious Mach-O binary with extremely large values in these fields, causing Quill to attempt to allocate excessive memory. This leads to memory exhaustion and denial of service, potentially crashing the host process. Both the Quill CLI and Go library are affected when used to parse untrusted Mach-O files.\n\n\n### Patches\n\nFixed in Quill `v0.7.1`\n\n\n### Workarounds\n\nNone\n\n### Credit\n\nAnchore would like to thank opera-aklajn (Opera) for reporting this vulnerability\n\n### Resources\n\n- [Inside code signing: hashes (Apple documentation)](https://developer.apple.com/documentation/technotes/tn3126-inside-code-signing-hashes)",
  "id": "GHSA-xj69-m9qq-8m94",
  "modified": "2026-03-11T21:37:54Z",
  "published": "2026-03-11T00:38:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/anchore/quill/security/advisories/GHSA-xj69-m9qq-8m94"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31961"
    },
    {
      "type": "WEB",
      "url": "https://github.com/anchore/quill/commit/80cf3fe082678af0ec4f9f8dd93f39189d2dc1fe"
    },
    {
      "type": "WEB",
      "url": "https://developer.apple.com/documentation/technotes/tn3126-inside-code-signing-hashes"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/anchore/quill"
    },
    {
      "type": "WEB",
      "url": "https://github.com/anchore/quill/releases/tag/v0.7.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Quill has unbounded memory allocation via unvalidated size fields in Mach-O binary parsing"
}

CVE-2026-31961 (GCVE-0-2026-31961)

Vulnerability from cvelistv5 – Published: 2026-03-11 19:32 – Updated: 2026-03-11 19:58

Title

Unbounded memory allocation in Quill via unvalidated size fields in Mach-O binary parsing

Summary

Quill provides simple mac binary signing and notarization from any platform. Quill before version v0.7.1 contains an unbounded memory allocation vulnerability when parsing Mach-O binaries. Exploitation requires that Quill processes an attacker-supplied Mach-O binary, which is most likely in environments such as CI/CD pipelines, shared signing services, or any workflow where externally-submitted binaries are accepted for signing. When parsing a Mach-O binary, Quill reads several size and count fields from the LC_CODE_SIGNATURE load command and embedded code signing structures (SuperBlob, BlobIndex) and uses them to allocate memory buffers without validating that the values are reasonable or consistent with the actual file size. Affected fields include DataSize, DataOffset, and Size from the load command, Count from the SuperBlob header, and Length from individual blob headers. An attacker can craft a minimal (~4KB) malicious Mach-O binary with extremely large values in these fields, causing Quill to attempt to allocate excessive memory. This leads to memory exhaustion and denial of service, potentially crashing the host process. Both the Quill CLI and Go library are affected when used to parse untrusted Mach-O files. This vulnerability is fixed in 0.7.1.

Severity

5.5 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-11 19:58 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7895 records in the last 180 days details

References

1 reference

URL	Tags
https://github.com/anchore/quill/security/advisor…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
anchore	quill	Affected: < 0.7.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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                "id": "CVE-2026-31961",
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        }
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            "confidentialityImpact": "NONE",
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    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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