CVE catalog

CVE-2020-27819

r-cran-readxl affected and fixed versions

An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Nov 27, 2020, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.83% · Oct 27, 2026

Projects and upstream resources

[r-cran-readxl][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Distribution / release	Package	Version	Status	Source
Debiantrixie	r-cran-readxl	Not reported	Not affectedDistribution reports not affected	[CVE-2020-27819]
Debiantrixie	r-cran-readxl	`1.4.5-1`	Not affected	[CVE-2020-27819]
Debiansid	r-cran-readxl	Not reported	Not affectedDistribution reports not affected	[CVE-2020-27819]
Debiansid	r-cran-readxl	`1.6.0-1`	Not affected	[CVE-2020-27819]
Opensuseleap 15.2	libxls	`1.6.2-lp152.2.3.1`	UnknownSource applicability is not established	[OPENSUSE-SU-2021:0812-1]Feb 4, 2026, 2:27:59 AM UTC
Debianforky	r-cran-readxl	Not reported	Not affectedDistribution reports not affected	[CVE-2020-27819]
Debianforky	r-cran-readxl	`1.6.0-1`	Not affected	[CVE-2020-27819]
Debianbookworm	r-cran-readxl	Not reported	Not affectedDistribution reports not affected	[CVE-2020-27819]
Debianbookworm	r-cran-readxl	`1.4.2-1`	Not affected	[CVE-2020-27819]

Provider details and historical evidence

Distribution / release	Package	Version	Status	Source
Debianbookworm	r-cran-readxl	Not reported	Not affectedDistribution reports not affected	[CVE-2020-27819]
Debianbookworm	r-cran-readxl	`1.4.2-1`	Not affected	[CVE-2020-27819]
Debianforky	r-cran-readxl	Not reported	Not affectedDistribution reports not affected	[CVE-2020-27819]
Debianforky	r-cran-readxl	`1.6.0-1`	Not affected	[CVE-2020-27819]
Debiansid	r-cran-readxl	Not reported	Not affectedDistribution reports not affected	[CVE-2020-27819]
Debiansid	r-cran-readxl	`1.6.0-1`	Not affected	[CVE-2020-27819]
Debiantrixie	r-cran-readxl	Not reported	Not affectedDistribution reports not affected	[CVE-2020-27819]
Debiantrixie	r-cran-readxl	`1.4.5-1`	Not affected	[CVE-2020-27819]
Opensuseleap 15.2	libxls	`1.6.2-lp152.2.3.1`	UnknownSource applicability is not established	[OPENSUSE-SU-2021:0812-1]Feb 4, 2026, 2:27:59 AM UTC

Original provider fields

{
  "package_releases": [
    {
      "name": "r-cran-readxl",
      "status": "not affected",
      "release": "sid",
      "version": "1.6.0-1"
    },
    {
      "name": "r-cran-readxl",
      "status": "not affected",
      "release": "forky",
      "version": "1.6.0-1"
    },
    {
      "name": "r-cran-readxl",
      "status": "not affected",
      "release": "trixie",
      "version": "1.4.5-1"
    },
    {
      "name": "r-cran-readxl",
      "status": "not affected",
      "release": "bookworm",
      "version": "1.4.2-1"
    }
  ],
  "fixed_versions": [
    {
      "bug": null,
      "name": "r-cran-readxl",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "r-cran-readxl",
      "type": "source",
      "origin": null,
      "release": "forky",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "r-cran-readxl",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "unimportant",
      "fixed_version": "0"
    },
    {
      "bug": null,
      "name": "r-cran-readxl",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "unimportant",
      "fixed_version": "0"
    }
  ],
  "distribution_packages": [
    {
      "name": "libxls",
      "distro": "opensuse",
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.6.2-lp152.2.3.1"
            }
          ]
        }
      ],
      "release": "leap 15.2",
      "versions": [],
      "ecosystem": "rpm",
      "provider_url": "https://osv.dev/vulnerability/openSUSE-SU-2021:0812-1",
      "fixed_version": "1.6.2-lp152.2.3.1",
      "provider_source": "pypi",
      "provider_record_id": "OPENSUSE-SU-2021:0812-1",
      "provider_updated_at": "2026-02-04T02:27:59.295776Z",
      "applicability_unknown": true
    }
  ]
}

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[r-cran-readxl]Unknown
Details (2)
- 1.4.2-1 · amd64 · bookworm
  Not affected
  dsa · r-cran-readxl · debian · bookworm
- 1.4.2-1 · arm64 · bookworm
  Not affected
  dsa · r-cran-readxl · debian · bookworm

Observed: Oct 23, 2026, 5:50:56 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]