https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-05T01:43:13.158526+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/euvd-2026-214712 EUVD-2026-214712 2026-10-05T01:43:13.161607+00:00 EUVD-2026-214712 https://cve.radiocsirt.org/vuln/fkie_cve-2023-26485 fkie_cve-2023-26485 2026-10-05T01:43:13.161641+00:00

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. A polynomial time complexity issue in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service. This CVE covers quadratic complexity issues when parsing text which leads with either large numbers of `_` characters. This issue has been addressed in version 0.29.0.gfm.10. Users are advised to upgrade. Users unable to upgrade should validate that their input comes from trusted sources.

### Impact

A polynomial time complexity issue in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service.

### Proof of concept

``` $ ~/cmark-gfm$ python3 -c 'pad = "_" * 100000; print(pad + "." + pad, end="")' | time ./build/src/cmark-gfm --to plaintext ```

Increasing the number 10000 in the above commands causes the running time to increase quadratically.

### Patches

This vulnerability have been patched in 0.29.0.gfm.10.

### Note on cmark and cmark-gfm

XXX: TBD

[cmark-gfm](https://github.com/github/cmark-gfm) is a fork of [cmark](https://github.com/commonmark/cmark) that adds the GitHub Flavored Markdown extensions. The two codebases have diverged over time, but share a common core. These bugs affect both `cmark` and `cmark-gfm`.

### Credit

We would like to thank @gravypod for reporting this vulnerability.

### References

https://en.wikipedia.org/wiki/Time_complexity

### For more information

If you have any questions or comm…

 https://cve.radiocsirt.org/vuln/gsd-2023-26485 gsd-2023-26485 2026-10-05T01:43:13.161703+00:00 gsd-2023-26485 https://cve.radiocsirt.org/vuln/ubuntu-cve-2023-26485 UBUNTU-CVE-2023-26485 2026-10-05T01:43:13.161728+00:00

Affected: Ubuntu:18.04:LTS: cmark, Ubuntu:20.04:LTS: cmark, Ubuntu:Pro:20.04:LTS: cmark-gfm, Ubuntu:22.04:LTS: cmark, Ubuntu:Pro:22.04:LTS: cmark-gfm, Ubuntu:24.04:LTS: cmark, Ubuntu:Pro:24.04:LTS: cmark-gfm, Ubuntu:25.10: cmark, Ubuntu:26.04:LTS: cmark

cmark-gfm is GitHub's fork of cmark, a CommonMark parsing and rendering library and program in C. A polynomial time complexity issue in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service. This CVE covers quadratic complexity issues when parsing text which leads with either large numbers of `_` characters. This issue has been addressed in version 0.29.0.gfm.10. Users are advised to upgrade. Users unable to upgrade should validate that their input comes from trusted sources. ### Impact A polynomial time complexity issue in cmark-gfm may lead to unbounded resource exhaustion and subsequent denial of service. ### Proof of concept ``` $ ~/cmark-gfm$ python3 -c 'pad = "_" * 100000; print(pad + "." + pad, end="")' | time ./build/src/cmark-gfm --to plaintext ``` Increasing the number 10000 in the above commands causes the running time to increase quadratically. ### Patches This vulnerability have been patched in 0.29.0.gfm.10. ### Note on cmark and cmark-gfm XXX: TBD [cmark-gfm](https://github.com/github/cmark-gfm) is a fork of [cmark](https://github.com/commonmark/cmark) that adds the GitHub Flavored Markdown extensions. The two codebases have diverged over time, but share a common core. These bugs affect both `cmark` and `cmark-gfm`. ### Credit We would like to thank @gravypod for reporting this vulnerability. ### References https://en.wikipedia.org/wiki/Time_complexity ### For more information If you have any questions or comments about this advi…