Vulnerability · Published Sep 17, 2026 · Assigned by GitHub_M

CVE-2026-54594OmniBlocks: Spamming in Discussions tab possible via disc.yml

Medium 5.3

In plain English

A medium-severity security flaw in monorepo from OmniBlocks. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 39% of all known vulnerabilities).

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.5%top 60.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

OmniBlocks is a monorepo for the OmniBlocks project. Prior to the June 6, 2026 workflow remediation, .github/workflows/disc.yml runs for the issues opened event and the issues edited event and invokes the createDiscussion mutation whenever an issue is classified as off-topic, without recording that the issue was already converted or otherwise suppressing duplicate runs. A user who creates one off-topic issue and repeatedly edits its description before conversion completes can therefore cause multiple discussions to be created for the same issue, producing discussion spam and additional moderation work. This issue is fixed with commit 627e0f0a16a7d74b09128106b57dd7e85d2545df.

Affected products (as reported)

Vendor	Product	Versions
OmniBlocks	monorepo	< OmniBlocks

Weakness: CWE-799 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

References

https://github.com/OmniBlocks/monorepo/security/advisories/GHSA-pq9c-3595-72jq x_refsource_CONFIRM
https://github.com/OmniBlocks/monorepo/commit/2953ef77649fc3c206fc1ee306f74cedc31b67e3 x_refsource_MISC
https://github.com/OmniBlocks/monorepo/commit/627e0f0a16a7d74b09128106b57dd7e85d2545df x_refsource_MISC