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Response snapshot Oct 27, 2026, 03:11 UTC

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Ruby Fixes Three Regex Engine Bugs Responsible for Four Critical GitLab RCE Flaws

Ruby has released versions 4.0.9, 3.4.12, and 3.3.13 to fix three bugs in Onigmo, the regular expression engine built into the language. The bugs lie behind four critical security flaws that GitLab patched over the past month.

At a glance

Exploited
Not known
Severity
Not scored yet
Chance of exploitation
Not estimated
Sources
1 source

What to do

Check the vendor advisory linked from the article for affected versions and fixes.

Read The Hacker News: Ruby Fixes Three Regex Engine Bugs Responsible for Four Critical GitLab RCE Flaws (opens a new tab)

What happened

Ruby has released versions 4.0.9, 3.4.12, and 3.3.13 to fix three bugs in Onigmo, the regular expression engine built into the language. The bugs lie behind four critical security flaws that GitLab patched over the past month.

GitLab found that a specially crafted pattern could corrupt memory while Ruby compiles it, potentially leading to code execution on its own servers.

Ruby says any

Related technology

Sources

  1. Reporting

    The Hacker News: Ruby Fixes Three Regex Engine Bugs Responsible for Four Critical GitLab RCE Flaws (opens a new tab)

    The article reports this vulnerability. It is reporting, not independently primary-confirmed or locally reviewed.

    Published Checked

  2. Reporting

    The Hacker News syndication feed (opens a new tab)

    The RSS/Atom/RDF entry supplied this exact link and any available title, date, and excerpt.

    Published Date not suppliedChecked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 23). Ruby Fixes Three Regex Engine Bugs Responsible for Four Critical GitLab RCE Flaws. https://kevwire.com/record/thehackernews-ruby-fixes-three-regex-engine-bugs-14b4c9cf953f

MLA

"Ruby Fixes Three Regex Engine Bugs Responsible for Four Critical GitLab RCE Flaws." KEVWire, 23 Oct. 2026, kevwire.com/record/thehackernews-ruby-fixes-three-regex-engine-bugs-14b4c9cf953f.

Chicago

KEVWire. "Ruby Fixes Three Regex Engine Bugs Responsible for Four Critical GitLab RCE Flaws." Last modified October 23, 2026. https://kevwire.com/record/thehackernews-ruby-fixes-three-regex-engine-bugs-14b4c9cf953f.

Evidence summary (plain text)

Ruby Fixes Three Regex Engine Bugs Responsible for Four Critical GitLab RCE Flaws (Oct 23, 2026).
Ruby has released versions 4.0.9, 3.4.12, and 3.3.13 to fix three bugs in Onigmo, the regular expression engine built into the language. The bugs lie behind four critical security flaws that GitLab patched over the past month.

GitLab found that a specially crafted pattern could corrupt memory while Ruby compiles it, potentially leading to code execution on its own servers.

Ruby says any
Sources:
The Hacker News: Ruby Fixes Three Regex Engine Bugs Responsible for Four Critical GitLab RCE Flaws: https://thehackernews.com/2026/10/ruby-fixes-three-regex-engine-bugs.html
The Hacker News syndication feed: https://feeds.feedburner.com/TheHackersNews
Record ID: thehackernews-ruby-fixes-three-regex-engine-bugs-14b4c9cf953f.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 27, 2026, 03:10 UTC. Ingestion is not an independent editorial investigation.

Syndicated reporting, unreviewed by KEVWire and not independently primary-confirmed. Consult the exact article and any primary disclosure it links.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

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