CVE-2026-77421

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.43% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 37.4% 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

Awaiting Analysis. NVD last modified this record on 2026-09-30.

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.

Published

2026-09-23 18:07Z1 MO AGO

Last updated

2026-09-23 19:43Z1 MO AGO

Reserved

2026-08-20

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-1333Inefficient Regular Expression ComplexityBase

Data version

5.2

Document digest

0c589156f7c3c6cc86bce720ffdc4c0800b9dd224cf8143bfd4504c27da352e5

• github.comhttps://github.com/jline/jline3/security/advisories/GHSA-ph9c-7hw9-vhhwx_refsource_CONFIRM
• github.comhttps://github.com/jline/jline3/pull/2012x_refsource_MISC
• github.comhttps://github.com/jline/jline3/pull/2018x_refsource_MISC
• github.comhttps://github.com/jline/jline3/commit/1d5fc3099e77938b971e197211cad2d4fbb17541x_refsource_MISC
• github.comhttps://github.com/jline/jline3/commit/341ee69ccc57b7733c1b40d6993219b64b3206aex_refsource_MISC
• github.comhttps://github.com/jline/jline3/releases/tag/4.3.1x_refsource_MISC
• github.comhttps://github.com/jline/jline3/releases/tag/jline-3.30.15x_refsource_MISC