  Gravastars, theoretical alternatives to black holes, have captured the
interest of scientists in astrophysics due to their unique properties. This
paper aims to further investigate the exact solution of a novel gravastar model
based on the Mazur-Mottola (2004) method within the framework of general
relativity, specifically by incorporating the cloud of strings and
quintessence. By analyzing the gravitational field and energy density of
gravastars, valuable insights into the nature of compact objects in the
universe can be gained. Understanding the stability of gravastars is also
crucial for our comprehension of black holes and alternative compact objects.
For this purpose, we present the Einstein field equations with the modified
matter source and calculate the exact solutions for the inner and intermediate
regions of gravastars. The exterior region is considered as a black hole
surrounded by the cloud of strings and quintessence, and the spacetimes are
matched using the Darmoise-Israel formalism. {An investigation is conducted on
the stability of gravastars using linearized radial perturbation. Additionally,
the proper length, energy content, and entropy of the shell are computed. The
stability of gravastars is positively correlated with the enhancement of the
cloud of strings parameter, while it is negatively correlated with the growth
in the quintessence field parameter.} The paper concludes with a summary of the
findings and their implications in the field of astrophysics and cosmology.
