VulnerabilityPublished 1 Oct 2025Updated 10 Sep 2026

CVE-2025-59842: JupyterLab LaTeX typesetter links did not enforce `noopener` attribute

Affects jupyterlabSource GCVE Database

Not known to be exploited : upgrade to 4.4.8 when convenient.

Data as of 26 Oct 2026, 12:29 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 4.4.8

Exploitation evidence

Disclosed: evidence found.
CVE published 1 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade jupyterlab to 4.4.8.

Patches and advisories

github.com/jupyterlab/jupyterlab/commit/88ef373039a8cc09f27d3814382a512d9033675c (opens in a new tab)

Affected software

Product	Affected	Fixed in
Bitnamijupyterlab`pkg:bitnami/jupyterlab`Other threats	Affected <4.4.8	Fixed in 4.4.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade JupyterLab to version 4.4.8 or later, where the issue is patched by enforcing the noopener attribute on LaTeX-generated links. No additional mitigation is required for default installations or in the absence of vulnerable third-party extensions.

Description

JupyterLab versions prior to 4.4.8 did not enforce the noopener attribute on links generated by LaTeX typesetters in Markdown files and cells. This could theoretically allow reverse tabnabbing attacks if third-party LaTeX-rendering extensions generated links with target=_blank, although no such extensions are currently known. The issue has been fixed in version 4.4.8.

References

Community reviews

Loading reviews…