CVE-2020-5238
Denial of service in table parsing in cmark-gfm
02 Description
Denial of service in table parsing in cmark-gfm
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.56% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 74.8% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-07-01 23:05Z6 YR AGO
- Last updated
- 2024-08-04 08:22Z2 YR AGO
- Reserved
- 2020-01-02
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-20Improper Input ValidationClass
- Data version
- 5.1
- Document digest
- d395ca74d2be4ff7c93b5c7b2e18db1cc9fa88076890e6cd7f4f9e2cdec59317
05 Affected products
06 References
- github.comhttps://github.com/github/cmark-gfm/security/advisories/GHSA-7gc6-9qr5-hc85
- github.comhttps://github.com/github/cmark-gfm/commit/85d895289c5ab67f988ca659493a64abb5fec7b4
- lists.fedoraproject.orgFEDORA-2020-c39d7a562chttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TCDHBTUFIOYRIS5HAS6PZNBNMB7IOAX3/
- lists.fedoraproject.orgFEDORA-2020-1eaffe0013https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZGJH2A4VAV54X6NSCNNGSEIGIIY5N2VR/
- lists.fedoraproject.orgFEDORA-2020-fe299b3fa3https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WMQFOQQCWOAMQ4I2XIVCVOXXIJ75HDCW/
07 Fixed in
AlmaLinux 8
- pandoc Fixed in 2.0.6-5.el8
- pandoc-common Fixed in 2.0.6-5.el8
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- pandoc Fixed in 2.0.6-5.el8
- pandoc-common Fixed in 2.0.6-5.el8
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- cmark-gfm Fixed in 0.29.0.gfm.2-1
- haskell-cmark-gfm Fixed in 0.2.1+ds1-1
- python-cmarkgfm Fixed in 0.7.0-1
- r-cran-commonmark Fixed in 1.8.0-1
- ruby-commonmarker Fixed in 0.21.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- cmark-gfm Fixed in 0.29.0.gfm.2-1
- haskell-cmark-gfm Fixed in 0.2.1+ds1-1
- python-cmarkgfm Fixed in 0.7.0-1
- r-cran-commonmark Fixed in 1.8.0-1
- ruby-commonmarker Fixed in 0.21.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- cmark-gfm Fixed in 0.29.0.gfm.2-1
- haskell-cmark-gfm Fixed in 0.2.1+ds1-1
- python-cmarkgfm Fixed in 0.7.0-1
- r-cran-commonmark Fixed in 1.8.0-1
- ruby-commonmarker Fixed in 0.21.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- haskell-cmark-gfm No fix yet
- python-cmarkgfm No fix yet
- r-cran-commonmark No fix yet
- ruby-commonmarker No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- haskell-cmark-gfm No fix yet
- python-cmarkgfm No fix yet
- r-cran-commonmark No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- haskell-cmark-gfm No fix yet
- python-cmarkgfm No fix yet
- r-cran-commonmark No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- haskell-cmark-gfm No fix yet
- python-cmarkgfm No fix yet
- r-cran-commonmark No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- haskell-cmark-gfm No fix yet
- python-cmarkgfm No fix yet
- r-cran-commonmark No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.10
- haskell-cmark-gfm No fix yet
- python-cmarkgfm No fix yet
- r-cran-commonmark No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- cmark-gfm No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.